there is one concept of Window period that means if some infective micro organism enter into our body and you test on next day your report comes negative even even micro organism present  in your body. test will come positive after overturn number of day , weeks or months onky every disease and every test have different window period hiv 1 pro viral dna QUALITATIVE test has window period of 17 days that means you have to do this test only after 17 days to get accurate result HIV DUO has 3 month window period RAPID HIV ELISA AND OTHER CARD TEST HAS 6 month window period same way HBsAg, HCV and VDRL has window period of 3 month so you have to do it after 3 month of exposure.

Best time to go for hiv test 17th Day of Exposure - HIV DNA Qualitative 43rd Day of Exposure - Westernblot 91st Day of Exlosure - Elisae Test

Hi, The only way to find out if you have HIV is to have an HIV test, as symptoms of HIV may not appear for many years, but antigen/antibody combination tests can find HIV as soon as 3 weeks after exposure to the virus or unprotected sex. And follow up tests are also needed and consult general physician for furthur treatment.