1.  Until recently. I was unfamiliar with the STI trichomoniasis.  Apparently, there is a significant risk it can be acquired even when using a condom.  Having learned this, I took 2g  of Metronidazole 2 or 3 days after having what I thought was safe sex.  My belated understanding was that it is important to avoid even minimal amounts of alcohol after taking this medication.  I actually had a glass of wine a few hours after taking it (but without any side effects).  Did my actions effectively eliminate risk, or would the lack of a bad reaction indicate the medication was not working.

1.  In the first place, you’ve been misinformed. Condoms are highly effective for prevention of trichomoniasis. Secondly, the reason persons taking metronidazole should not drink is because very rarely there are allergic reactions to the drug in persons who have taken alcohol at about the same time. Having had a glass of wine after taking the drug would in no way decrease the effectiveness of the metronidazole you took. If you had trichomoniasis, it was almost certainly cured by the metronidazole that you took.

2. Without penetration you are not at risk for gonorrhea, chlamydia, trichomoniasis, or HIV. The general rubbing ( frottage) that you described is generally considered safe sex.  We typically do not recommend STI’s or HIV testing for persons whose only exposure is frottage. The fact that you may have been exposed to your partner’s genital  secretions does not matter as long as penetration did not occur.

3.  Amongst penetrative sexual activities, unprotected oral sex is relatively low risk. Please remember that most persons do not have STI’s and, even if your partner was infected, most exposures did not result in infection. There is close to no risk from performing oral sex (cunnilingus) on an infected partner. On the other hand, with receipt of oral sex, the male partner is at relatively low risk for acquisition of gonorrhea. If you acquired gonorrhea you would be expected to become symptomatic within 3 to 5 days following exposure.  Well the risk is low, if you wish to be absolutely confident that you were not infected, I would recommend a urine test for gonorrhea and chlamydia as well as a throat swab for the same infections.

I hope the information I provided is helpful. If they are further questions or anything is unclear, please feel free to use your opted to follow up questions for clarification. EWH