Is Real Time HIV PCR (Roche-SaCycle96) reliable 8 days after possible exposure?

[Panos1978]

I had 3 times protected sex with a lady. Only gave to her unprotected oral. I'm a bit concerned that the 3rd time the condom broke but maybe this is a bit part of my fear and paranoia.
The attitude of the lady was what really made me seriously concerned.
I went for a PCR at 8 days after the possible exposure and came back NEG - At this moment, 3 days later, i'm starting to have flu-like symptoms (pain in a lymphnode and diarrhea). Obviously i worry that maybe i have done the test too soon...
I'm checking pubmed and internet for false negative PCR tests but i cant really find anything.
Has someone any practical knowledge about this issue? Any reliable answer would help.

[AnxiousNoMore]

Oral is not a sex risk for HIV. If a condom fails it is a big rip down the seam so both of you would have noticed. Therefore you had no risk and did not need to test so you can safely move on.
The above HIV science is 40 years old and well proven, so no detail that you can add will make your situation a risk.

[Panos1978]

Thanks and i understand what you are trying to say. What about the PCR though? Do you have any knowledge about its validity?

[AnxiousNoMore]

There is no testing guideline when you had no risk and no one in HIV history got it from oral, so reread the part about the 40.