Slight burning in urethra. Experiencing?

I had unprotected vaginal intercourse with a woman. She also performed unprotected oral sex on me. Since then I've been experiencing the following symptoms: most of the time I have a slight burning sensation in the urethra, sometimes my pc muscle seem fatigued for no apparent reason, sometimes there is a faint itch on my genitals, I am experiencing chapped lips and my mouth (inside of lips) sometimes has a slight burning sensation, my anus seems to be more itchy than normal (although I could just be dramatizing that one in my head). I had an std panel done about 2.5 weeks after initial contact. It tested for the usual suspects, chlamydia, syphilis, gonorrhea, hsv 1&2, hiv, trich...I know I'm missing a couple tests in there. Anyway, All of them came back negative (aside from hsv-1, which I've had). Before the results, doc started me on meds for trich. I took that for a week. I went back experiencing same symptoms. Doc started me on cipro. Any ideas what I'm actually experiencing?