Good evening. I had an encounter with a random girl I met in a nightclub in Guadalajara, Jalisco, Mexico, two weeks ago. She asked me to wear a condom, and I did, but sometime during sex I’m not pretty sure how it happened because I was drunk and was not wearing the condom anymore. I found it near me, and it had some blood of the girl, and I had a little blood on my penis. I did not ejaculate, and we stopped. I contacted her a week later to ask her if she had performed any tests in the past, and she informed me the last one she had was in January, and all was ok, but she broke up with her boyfriend because he cheated on her last month. We only had vaginal sex. Anxiety is eating me alive. I am a 23 Years Hispanic uncircumcised  

Welcome to our Forum. Thanks for your questions.  I'll be glad to comment.  The encounter you describe was low risk.  I say this because most women do not have STIs, including HIV and most single unprtected expsoures do not lead to infection.  That you were exposed to here blood makes no difference- blood is no more infectious than vaginal secretions.---

Hi Doctor, good evening. I took the test on the 15th day after the exposure, and it returned negative. Do I need to retest for HIV, or is this test reliable enough? 

I would have confidence in this result.  I see no need to retest for anything.  Time to put your concerns aside and move forward.  EWH---

Hi, I made a mistake. I had sex with my girlfriend, and although I used a condom during the whole vaginal sex correctly, she performed unprotected oral sex on me. I have not taken the tests yet to check for Syphilis, Gonorrhea, or Chlamydia. The issue is that I noticed that I have red pimples on my penis that weren't there before. They look like HSV 2, but they also look more like balanitis. After searching online, I am not sure. After the sex, I felt very itchy on my penis, and after checking it in, I noticed those red pimples were bright red and more noticeable.

I'll go straight to your final follow ups.  The "pimples" you have noted are almost certainly not herpes- if you were going to develop herpes lesions, they would have appeared within 10 days of your exposure and it is now nearly 20 days since, ruling out herpes.  Further, if the bumps were herpes, they would have evolved from bumps to small blisters and then small open ulcers within a day or so of appearance.  These bumps are NOT herpes acquired from the encounter you described.  Similarly, what you describe sounds nothing like gonorrhea, syphilis, chlamydia, or chancroid.  The bumps are probably totally unrelated to the expsoure you describe.  Thus:----