do i need any further hiv testing after three different tests?

Hello and welcome to e health forum. ‎

To avoid all the stress and anxiety, due to HIV, it is advised to confirm the HIV status from your sexual partners. In ‎case, it is highly impossible, then there is no alternative but to undergo screening tests for HIV, at regular intervals ‎until 3 to 6 months, as determined by a doctor. ‎

HIV is a incurable disease and prevention or early detection and proper treatment is the only available options ‎currently. Unprotected sexual intercourse does increase the risk of infection. ‎

Once you are exposed to HIV, you will need surveillance period of 3 months to 6 months, at least to make sure that ‎you are not HIV infected. ‎

The only measures for HIV detection is via blood tests to check for antibodies to HIV (Commonly called ELISA tests) ‎and also NAAT (Nucleic acid assay tests , eg PCR).

Getting a negative HIV antibody test, in the early days, does not ‎mean that you are free of infection. It is definitely possible that you may develop antibodies at a later date. Hence ‎retesting at a later date after 12 weeks is definitely adviced to get a conclusive result. ‎

The best test to detect HIV within the window period (before 4 weeks) is the HIV DNA PCR. This is a test, used to detect ‎the presence of Proviral DNA, synthesized from HIV viral RNA, using the ‎reverse transcription ‎technology. This test is a much more sensitive test than HIV RNA PCR, and can be done after 2 weeks ‎of exposure, to get a reliable and conclusive result. ‎

In case you have done a HIV antibody ELISA test, after 12 weeks, post exposure, and it is negative, it is certainly possible that you are HIV negative, and the results are conclusive.

I hope this helps.