I had unprotected anal sex with a friend 10 weeks ago. He was tested for stds and hiv in Dec, and I was negative. I have tested negative for hiv at 10 weeks. I have not had any sex since event 10 weeks ago. I had no symptoms of anything, but this week when I masturbated I noticed very little semen came out when I ejaculated. Three days later I had a very cloudy discharge when I urinated. The next day my right testicle was aching, and hurt to the touch,,,further inspection proved it to be the epydimis, not the actual testicle. Still aches ... Is this an STD or something to do with my weird masturbation session that ended without ejaculation?