Hello experts,

Welcome to our Forum and thanks for your questions.  I'll be glad to comment.  The encounter you describe was very low risk.  Your only (small) risk for STI from receipt of unprotected oral sex was for acquisition of gonorrhea and, as you note, gonorrhea typically becomes symptomatic within 3-4 days after sex.  Your vaginal exposure was condom protected and therefore safe sex.  i would not worry and see little medical reason for concern or testing.  ---

Hi Dr, Hook,

Often we find that when clients become concerned about STI/HIV risk following an encounter that they have come to regret, they tend to inspect their genitalia far more closely than ever before and, in doing so, come to notice normal sensations, small lesions, normal urethral discharge, and other irregularities which were previously unnoticed.  I suspect that this is what is happening here.  I suspect that this is the case here.  In some instances of this sort, clients choose to test for the most common STIs (gonorrhea, non-gonococcal urethritis (NGU) for the peace of mind it provides.  The testing virtually always shows that no infection is present.  I would not worry but if you choose to test, please commit to accepting the results, which I anticipate will show no infection, when they are available.  This in no way changes my earlier assessment.  I would not hesitate to have unprotected sex with your regular partner at this time. EWH---

Thank you! To summarize: if I always have condom-protected vaginal sex (and make sure I use it correctly, and it does not break), and unprotected oral sex with female csw, the probability of me getting HIV is close to 0 when the absolute 0 can not be achieved. Probably equal to: hit by lightening, contracted some unknown virus, hiv becomes mutant and can be transmitted through air, etc..... 

Correct.---