Your health care provider may be able to tell right away if you have an STI, but some tests can take a few days to get results.
If you take a rapid HIV test, chances are you’ll be able to wait on-site for the results. If the test comes back negative, and you haven’t had a possible exposure during the previous three months, you can be confident you do not have HIV.
However, if your rapid test is positive, the health care provider will need to send a blood sample to a lab for additional testing. You can generally expect results within a few days.
If you think you’ve recently been exposed to HIV, a health care provider may also talk to you about window periods, the period between when you’re exposed to HIV and when a test can detect the virus. During the window period, a test may show a negative result even though HIV is present. The window period varies from person to person and depends on the type of HIV test administered, but most HIV antigen/antibody tests will detect a positive result in 6 weeks.
With any test, ask your health care provider how long your results should take. If you don’t hear back within that timeframe, follow up with a call.