About 4 years ago, I started noticing blood in my urine after sex and sometimes in my semen, Went to a Urologist and everything was fine, even had a camera put down my penis for observation. Still nothing. So over the last 4 years it sometimes does this and sometimes it doesn t, I have no pain, no bruising, no marks or swelling. It even does it sometimes if I masturbate, sometimes in the urine sometimes just the semen. What should I do?