Hi, I have just passed a very large blood clot in my urine. I am a 42 year old male, and this occurred about 2 hours after sex. There was no trauma during sex and no evidence of blood at the time. When I tried to urinate after an hour, I initially passed blood then was unable to continue urination despite really needing to go. It took another hour of trying (and a couple of pints of water) before I was able to force the clot out. It was around 2 inches long by 3/4 inch wide, and very gelatinous. My urine was pink and bloody for the next 2 urinations and is now clear. I have no pain. Any ideas?