Actual receptive oral exposure to HIV source, PEP

[strata]

I'm a 30yo bi-male who had a recent receptive oral exposure to an HIV+ source. I came into contact with pre-ejaculate but not semen/ejaculate. I am currently 3 weeks post-exposure and taking nPEP (started 24 hours post-exp).

I originally posted in the Dr HHH-monitored HIV Prevention forum:

http://www.medhelp.org/perl6/HIV/messages/696.html

I tested negative at day 18 using finger stick OraQuick. I'm awaiting results from the whole blood ELISA and PCR DNA/RNA taken same day.

Here are my questions:

Have any members of this forum...

1) ...contracted HIV from receptive oral with a man (i.e., giving a blow job)? Was ejaculation involved? Were there any aggravating factors (oral pathology, e.g., periodontal disease, gigivitis, etc.)?

2) ...contracted HIV despite the use of PEP? If so, what was the exposure? When was PEP started? Was the full 28-day course completed?

3) ...experienced negative health outcomes from the use of PEP (e.g., liver damage)?

4) ...tested HIV+ after having initially tested HIV- at less than 6 weeks?

There are a few reports of HIV transmission from oral sex, but the most reliable reports involve some sort of oral pathology. There are several questionable reports or oral transmission of HIV because riskier acts from the same exposure (e.g., unprotected receptive anal sex) are often under-reported (as revealed after multiple follow-up interviews). Consequently, it's hard to get a feeling about the 'true' risk.

Dr HHH handicaps my risk as 1/500,000.

My est: 1/10,000 * .2 (PEP) * .5 (3wk HIV-) = 1/100,000.

Still nervous...