About 6 weeks ago I had unprotected vaginal sex with an 18 year old girl who goes to the same college as me. Ever since that encounter something clicked in my head that unprotected sex is a very foolish move. I can't take back what I have already done so I began fearing that I had every STD in the book at first it was particularly genital herpes. I went to planned parenthood and had some test done they said there was no visible sores and it didn't look like herpes but I also had urethra swab testing positive for NGU and then later a urine test confirming it was chlamydia. I took two doses of Azithrmycin and experienced some weird bowel movements in the weeks after. Over this time began obsessing about having HIV and I mean like really convincing myself. It was a single exposure and third partner I have every had. She is an 18 year old white girl from Wisconsin. I have an itchy rash on my chest and thighs, had a weird canker sore on my gum, and white on my tongue that scraped off when I brushed it, I've been really unmotivated and anxious since the exposure and can not stop my fixation of possibly getting HIV. Also she and her ex boyfriend (who was the one to give her chlamydia) got tested for Hiv and both came back negative however my concern is that both of these people were in the window period making my risk extremely high for contracting hiv being that she was in the window period and also gave me chlamydia.