About three weeks ago, I went into the walk in clinic as I had severe burning and pain when I urinated. I also had a burning sensation in my testicles. They ran tests and everything came back negative for bacteria and for ghonorea and chlmaydia. They did not test for genital herpes as there were no signs of herpes. It has been 4 weeks since my last sexual encounter, and I still have some slight burning sensation in my testicles and also some redness and soreness on the tip of my penis. I also have some itching around my anus that has recently started. Could this be herpes? Ive attached a picture of my penis showing the redness and irritation of the head.