Timing your test · 2,100+ locations nationwide
When to Get Tested for STDs
Test too early and you can get a false “all clear.” The right timing depends on what happened and when – here is how to think about it, and the one-minute call that settles it.
Quick answer: If you had an exposure and feel fine, the right time to test depends on which infection you are worried about and when it happened – every STD takes a different amount of time to show up on a test, and a negative result taken too early may need to be repeated. If you have symptoms, get looked at promptly: order the test, and if there is a sore or rash to examine or the symptoms are severe, see a clinician as well. Call (866) 872-1888, tell a care advisor what happened and when, and they will tell you which test to take and on which day.
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- Order online or call(866) 872-1888, open 24 hours
- Physicians on callCare & treatment if you test positive
Not sure what to test for? Talk to someone first.
Most people call before they order. Tell a care advisor what happened and when – no judgment, no awkwardness – and they will tell you exactly what makes sense, place the order with you, and pick the lab closest to you. The line is open 24 hours a day.
- Talk to a real person, privately
- Get the right test the first time
- Your lab order is at the test center in 2–3 minutes
How soon after exposure each test can find an infection
Written by the RSC Health editorial team · Updated September 9, 2026
Every infection takes time to show up on a test – the “window period” – and a negative result taken too early may not mean anything. The middle column is when the laboratory test we use usually detects the infection, based on CDC guidance. The right-hand column is when a negative result should be repeated, or when a clinician rather than a lab test is the right next step. These are typical figures, not guarantees: PEP or PrEP, recent antibiotics, pregnancy and a weakened immune system can all change them, so tell the care advisor or physician about any of those.
| Infection | Test we use | Typical detection timing | When to repeat, or see a clinician |
|---|---|---|---|
| Chlamydia | Urine NAAT | Usually detectable 1–2 weeks after exposure | Test again if symptoms start or continue, after any new exposure, and about 3 months after treatment (re-infection is common). A urine test does not check the throat or rectum. |
| Gonorrhea | Urine NAAT | Usually detectable 1–2 weeks after exposure | As for chlamydia. A throat infection also needs a test of cure 1–2 weeks after treatment. A urine test does not check the throat or rectum. |
| Trichomoniasis | Urine NAAT | Usually detectable within 1–4 weeks of exposure; there is no formally defined window period | Test again if symptoms continue after a negative result; women should retest about 3 months after treatment. |
| HIV – RNA early detection | Blood NAT, HIV-1 | Usually detects HIV 10–33 days after exposure (CDC) | A negative result in the first weeks is not final; the physician usually recommends a follow-up 4th-generation test. Not the right test on its own if you are taking PEP or PrEP – tell us. |
| HIV – 4th-generation antigen/antibody | Blood, HIV-1 and HIV-2 | Usually detects HIV 18–45 days after exposure (CDC) | A negative result taken less than 45 days after an exposure should be repeated. PEP or PrEP can delay detection – tell the physician. |
| Syphilis | Blood antibody screen with confirmation | Antibodies usually detectable 3–6 weeks after exposure; can take up to 12 weeks | A sore should be examined now – the blood test can be negative while a sore is present. Repeat a negative at 12 weeks after a known exposure. A partner’s diagnosis usually means treatment without waiting for a result. |
| Herpes 1 & 2 (IgG antibody) | Blood, type-specific | Antibodies usually detectable 4–6 weeks after exposure; can take 12–16 weeks or longer (CDC) | A blister or sore should be swabbed by a clinician while it is present – the blood test cannot diagnose a sore. A negative before 12 weeks is not final. A low positive HSV-2 result may need a confirmatory test. |
| Hepatitis B | Blood, surface antigen (HBsAg) | Usually detectable 1–9 weeks after exposure, on average about 4 weeks | Shows current infection only; it does not show immunity or a past, cleared infection. Exposure in the last 7 days: ask about the vaccine and immune globulin, which can prevent infection. |
| Hepatitis C | Blood antibody | Antibodies usually detectable 8–11 weeks after exposure (CDC) | For a recent exposure an RNA test can find infection within 1–2 weeks – ask the physician. Repeat a negative antibody test 6 months after a known exposure. A positive antibody result needs an RNA test to tell whether the infection is still present. |
| Hepatitis A | Blood antibody | IgM antibody appears as symptoms begin, usually 2–7 weeks after exposure; total antibody shows past infection or vaccination | Exposure in the last 2 weeks: the vaccine or immune globulin can prevent illness – do not wait for a test. A total-antibody result alone cannot tell a current infection from an old one. |
Mycoplasma genitalium is not in the table: the CDC recommends testing for it when symptoms of urethritis or cervicitis persist or return after treatment, not after an exposure without symptoms. The 10-Test Panel has no single date: each test on it follows its own row above, so a panel taken a few weeks after an exposure may need one or two tests repeated later – the care advisor or physician will say which. Symptoms are a reason to be seen promptly, not a guarantee that a test will find the cause: they do not shorten a window period, and many have causes that are not an STD.
Call (866) 872-1888 – tell us the date, we’ll tell you the day
Resources
- Getting Tested for HIV – window periods by test type. Centers for Disease Control and Prevention.
- Post-Exposure Prophylaxis (PEP). Centers for Disease Control and Prevention.
- Sexually Transmitted Infections Treatment Guidelines, 2021. Centers for Disease Control and Prevention.
- Screening Recommendations and Considerations. CDC STI Treatment Guidelines, 2021.
- Genital Herpes Testing. Centers for Disease Control and Prevention.
- Clinical Testing and Diagnosis for Hepatitis C. Centers for Disease Control and Prevention.
- Clinical Testing and Diagnosis for Hepatitis B. Centers for Disease Control and Prevention.
- Getting Tested for STIs. Centers for Disease Control and Prevention.
Get tested in three easy steps
Tell us what you’re worried about, or pick the tests yourself. A doctor’s order is included – you don’t need a referral or an appointment.
Your lab order reaches the test center in 2–3 minutes, so you can walk in today – no appointment. Go to the lab you chose during the hours listed. Sign in at the kiosk with your name and date of birth – no ID needed – give a small blood or urine sample, and you’re done in about 5 minutes. No exam, no questions, no waiting room full of people.
Results post to your private account in 1–2 business days. Prefer not to log in or get an email? Call and we’ll read your result to you. If anything needs attention, our care team calls you to walk through treatment – for many infections that’s a prescription; for others the physician arranges an in-person visit or a referral.
Not sure what to test for? Talk to someone first.
Most people call before they order. Tell a care advisor what happened and when – no judgment, no awkwardness – and they will tell you exactly what makes sense, place the order with you, and pick the lab closest to you. The line is open 24 hours a day.
- Talk to a real person, privately
- Get the right test the first time
- Your lab order is at the test center in 2–3 minutes
Nobody finds out but you.
Nothing goes to your insurance. Nothing comes in the mail. Your visit doesn’t announce why you’re there. Our partner labs collect samples for many different kinds of testing. To other people in the waiting room, you’re simply another person having a routine lab visit. Your results go only to you, in your secure account, and your card statement just says RSC Health.
Not sure what to test for?
Call (866) 872-1888. Our care advisors talk to people in your exact situation every day – no judgment, no awkwardness. They’ll tell you what makes sense based on what happened and when.
Call (866) 872-1888 Get Tested Online
Questions people ask
What happens if I test too early?
You can get a negative result that isn’t real, because the infection hasn’t produced enough of what the test looks for. That’s why we ask when the exposure was – and why we sometimes say test now and again later.
Can I just call and ask which test to take?
Yes – that’s the most common call we get. Tell a care advisor what happened and when, and they’ll tell you which test and which day.
How fast do I get results?
Most results are ready in 1–2 business days and are posted to your private online account. You get an email saying they’re ready – nothing else is in it.
Will anyone find out I was tested?
No. We never bill insurance, nothing is mailed, your lab visit doesn’t announce why you’re there (our partner labs collect samples for many kinds of testing, so you’re simply another routine visit), and your card statement just says RSC Health. Results go only to your private online account.
