I (male) had a sexual encounter a month ago with a female.  The encounter was protected vaginal and unprotected oral.  There was a few seconds of unprotected frottage, and maybe my penis penetrated her vagina by the bare minimum amount for a few seconds.  36 hours later I received the CDC-recommended treatment for chlamydia and gonorrea prophylactically.  I also tested for both infections and the results came back negative 36 hours after the potential exposure.

I have had no discharge, puss, or burning when urinating.  The only potential symptoms I’ve experienced—and they started about a week ago, so 3 weeks after the potential exposure—is a faint tingling just on the inside of the tip of my penis.  It’s very faint and if anything it’s more a feeling of constantly being aware of the tip of my penis (if that makes sense).  I also feel like I’ve been urinating a lot more but I’m not sure.  I don’t know if these experiences are real or if they’re all in my mind because of my anxiety.

My questions:

1) if i had been infected with chlamydia or gonorrea, would the treatment I received 36 hours after the potential exposure have cured the infections?  I’m not sure if you have to wait a certain amount of time to be treated.

2) were the negative test results reliable after 36 hours after exposure?

3) should I be concerned that I had sex with my girlfriend three weeks after the potential exposure and three weeks after I was treated as described above?

Thank you very much for considering my questions.

The risk of any infection was low from this event, and your test results are reliable.

1) Yes, those treatments would have aborted either of these infections. It's never too soon to treat. 

2) Your tests were too soon to be reliable, but it doesn't matter. If you had been infected, the treatments would have prevented infections rom taking hold. 

3) You could not have infected your regular partner three weeks later. Don't worry about it.

I hope these comments relieve your worries. Let me know if anything isn't clear.

HHH, MD

Based on the experience I described in my original post, and if you’ve ruled our gonorrea and chlamydia based on the treatment I received 36 hours after exposure—cefTRIAXone (Rocephin) vial 500 mg + 1g azithromycin—what other STIs could possibly be involved?  NGU or Syphilis?  I should note that I also received doxypep (Doxycycline Hyclate 100 Mg Tab x 2) at the same time as the other treatment.  I ask because the “tingling” and apparent increased need to urinate I described above is still there.  Again, the “tingling” is really faint, and if I’m working or otherwise distracted, I forget it’s even there.  And when I press on my penis, particularly on the tip, it feels a little sensitive inside the tip.  I really wonder if it’s all psychosomatic.  

That completes the two follow-up questions and replies included with each initial question and so ends this thread. I hope the discussion has been helpful. Best wishes and stay safe.