18 months ago I had unprotected sex with a woman of questionable sexual health. the very day after I noticed pain in my pen is and testis. No discarge, did not really hurt any more when I urinated, but a stinging around the head and bottom of the head of my penis. It actually hurt to lay on my stomach as my whole groin area was a bit tender. I went to a GP who though I had gonorea, he put me on a course of z pak and said I would be fine. I wasn't, I also had the whole battery of STD tests ran which came back negative. Back to the doctor who then though mybe my prostrate was a bit "boggy" as he put it. A 2 week course of an antibiotic followed, no relief. Next he refered me to a urologist who also checked my prostrate and sis a urine sample, and scoped my urethera. Found nothing. 2 months pass with the pain and I go back again. He prescribes pain meds. This helps a little as long as I take them, but still I do not feel like I used to. I see no signs of any thing other than some color variation on the head of my penis. I should also note that if I lay flat on my back while sleeping in the morning the pain is nearly gone, but comes back after about 15 mins of being up. About 3 times during this period the pain almost went away for about 3-4 days, than came back. I am loosing my mind as this consumes my thougths daily! The pain on my testicals feels like someone is pulling my pubic hair to the point it will come out. I should also note that at times I have lower back pain with it and my urine seems to be far more yellow since this incident. Please help!!!