One of the most consistent themes on this forum is that oral sex is safe sex with respect to HIV and other STDs. It isn't zero risk, but the chance of infection is far lower than for vaginal or anal sex for all STDs, and zero risk for some. There have been very, very few cases of HIV that appeared to have been acquired by performing oral sex, i.e. penile to oral transmission. (There are truly zero known transmissions for penis to mouth or for cunnilingus, i.e. vaginal-oral contact.) One estimate (from CDC) is that performing oral on an infected male has a 1 in 10,000 chance of infection. That's equivalent to giving BJs to infected men once daily for 27 years before transmission might be likely.

For those reasons, HIV testing normally is not done or recommended after exposures like yours. In any case, for sure you are not infected. Inconclusive results on the Ag/Ab (4th generation) HIV blood tests are very rare, but, as in your case, they almost always prove to be negative, as has been found in your case. The combination of repeat antigen testing (perhaps a test for p24 antigen; if it was RNA they probably would have called it an RNA or PCR test) plus Western blod is conclusive at ~5 weeks after exposure. To your specific questions:

1) Yes, your results are conclusive.

2) Your doctor apparently is just more conservative about such things, and doing another test a few weeks later is common in situations like this. It's just a question of being careful. YOu can definitely expect another negative result. (Remember that the chance you were infected was only 1 10,000 even if your partner had HIV, which he probably didn't.)

3) As I said, this is a rare outcome. The explanations for false positive or inconclusive tests aren't known. They do not appear to imply any problem with health or the immune system. I doubt your cold had anything to do with it, but cannot say for sure. Certainly I have not avoided HIV testing in people with colds and will not do so in the future.

4) Nope, no concern. Stay mellow pending the final test.

I hope this information has been helpful. Best wishes and stay safe--  HHH, MD

Many thanks for the prompt reply and the reassurance of my test results to be conclusive. 

Out of curiosity, how accurate are both the HIV P24 antigen test and Western Blot? I understand that western blot is being used as confirmatory test. And what are the window period for both tests. 

 Thank you!

I got my HIV test results back. Exactly identical to the first test I did a month ago (reactive to the combo test; non-reactive to both Antigen P24 and WB Antibody tests). My Dr. said it is conclusive I am all clear. 

She advised that I mention this situation in my future tests. 

She said apparently other type of antibodies might have set off the system. 

What is your view on this? 

Thanks!

That concludes the two follow-up comments and replies included with each question, and so concludes this thread. Take care and stay safe!