I made a bad judgment call and cheated on my girlfriend and had protected sex and uncovered oral from a legal and licenced sex worker 2 weeks ago. a few days prior to that I had unprotected sex with my girlfriend who happened to have a bladder infection at the time. a day or 2 following the sex with worker I felt a very mild discomfort in the very tip of my penis. Its was like a very slight tingle with some sensitivity. there's no pain, no discharge at all. very rarely and randomly it will feel like I have a tiny drop of pee that just wont come out. I dont have to pee a lot, and it doesn't hurt to pee, nor does it hurt to ejaculate. The discomfort comes and goes through the day, it seems more frequently when my pants are rubbing or touching. Could you give me an idea of what im facing and the actual chances of having an STD are? could this be all in my head built from guilt and anxiety?