STD or not?

[maybenot]

I had unprotected sex with a girl for two times about two months ago. It took about 1-2 days and I started having UTI kind of symptoms. Problems urinating and a little bit of stinging/burning sensation while doing so. I had plenty of STD tests taken (some of them twice) and everything except one turned out to be negative. Ureaplasma parvum was found.

My doctor was pretty sure that my symptoms were probably not related to it and he also added that it can be found from healthy people as well. Anyway a 10 day doxycycline treatment was started. I finished the course of antibiotics and went back to the doctor as nothing had changed. Doctor checked my prostate and while he was fingering it, I didn't feel bad at all. I ended up getting a new round of antibiotics, 500 mg of levofloxacin for 7 days.

I have now finished the second round of antibiotics and here I am, still with mild stinging sensation on my penis. It's not super bad, but its starting to drive me crazy. Everything started after having unprotected sex, so it's really hard to convince myself that it would be something else than an STD. I think the symptoms were worse in the beginning though. Is it possible that it could be herpes? Nothing else really seems to have that short incubation period except for gonorrhea and herpes.

I've been tested for pretty much everything except for herpes. I think they will not do it as I don't have any signs for it outside my body. They were pretty much instructing me to see urologist next. Any questions?

[maybenot]

Any ideas what it could be?