Thank you very much for your post and welcome to our forum.
I do not thinkl that you need to worry at all. Firstly your sexual encounter did not involve any HIV risk. You used a condom and that is safe. If the condom breaks, it usually rips and you would have noticed it. Secondly you had a negative antibody test at 8 weeks. That can be considered conclusive. And thirdly, the leady in question was tested negative as well, even if it was an antibody test only after 4 weeks of the sexual encounter. That would reduce the cahnces significantly that she was positive in the first place.
The protein that you take does not affect the realibility of the test.
In summary, I can assure you that you are HIV negative. You do not need any further tests. You ought to forget it and move on.
Sorry Dr.Jose, I forgot to add that I am a healthy male(22 years ) old and I am not taking any medication except gym proteit, can it affect antibody production ?
Sorry, for a lot of add-ups. The sexual worker in question tested negative 4 weeks after the exposure( however, she lives in Russia, so it is quite possible they still use 1st or 2nd generation test), however would you consider this fact at least reassuring ?