have urinated blood off and on for quite a few years. have had quite a few exams with the scope have had no luck finding anything. summer 2012 had in office surgery, had abio taken, no cancer. dr. said he really didn t find anything. sent me home, told me to do whatever i normally do. week later was shoveling snow off driveway . day or two later started bleeding alot, urinated fine one minute then about five minutes later couldn t pee at all, it was like black tar started to have stomach spasms. started out with catheter #8 ended up using #22. had a total of 7 units of blood. monday the 31 all of a sudden started peeing blood again, bright red thruout my peening. need assistance!