I need to still the paranoia...

Hello and welcome to e health forum.

Since the intercourse was protected, it might not be enough to pass on the infection. With respect to oral sex, transmission from a female to a male during oral sex is very less. There have been recorded cases of getting HIV from sucking or giving head BUT ‎there have been no recorded cases of getting HIV from getting sucked.‎ Hence the overall risk of infection would be less.

But it is always better to get tested, so that concrete evidence of a HIV negative status will help to reduce the anxiety and stress.

Polymerase chain reaction (PCR) for proviral DNA (PCR -DNA) is a important test that can detect ‎‎‎‎proviral DNA during window ‎period, can ‎differentiate latent HIV infection from active viral transcription ‎‎‎‎and can quantitate the ‎number of HIV DNA. ‎

The DNA PCR is the absolute most sensitive test for HIV, and can be done anytime after 2 weeks post exposure. In case it is Negative, it will be definitive that you do not have HIV infection.

HIV DUO test, which is also called as a 4th generation HIV test, is a 100% ‎sensitive test, and it tests for both HIV-1/2 antibody and p24 antigens. Its specificity is 99.77% in individuals ‎at low risk for HIV infection. Hence it is a very accurate test for HIV screening. ‎This test can be done at any time after 4 weeks of exposure, and will give a very accurate and reliable reading to confirm your HIV status.

Since it is already more than 7 weeks (48 days) since the exposure, it will be much economical for you to undergo a 4th generation HIV test, instead of a PCR test (which is expensive). There is no need to do a expensive test, in your case, since a very reliable test, like HIV duo test is available to know the same.

I hope this helps.‎