Worry? No, concerned yes. Cynthia and most of us would certainly say get a second opinion. You want a URO practice that see's lots of bladder cancer as many see men mostly for prostatic problems. Even a major hospital or teaching hospital if convenient. This easily could be a stubborn UTI (I assume your Doc has checked) that needs a specialized test. It could be stones that are thrown nicking parts of the urinary tract. It could be a cancer of kidneys or bladder. It could be unknown, intermittent bleeding that some people have and never find a reason (I actually know people that have done this over several years). It could be a "runners" bleeding as some long distance and vigorous workouts make some people pass blood infrequently.
It still begs the question of why 3 exams show hematuria (blood) so get that second opinion. Typically you may get another cysto scope and probably a CT scan with dye that reads the kidneys etc. None of us are doctors so there may even be a few more tests suggested. Here's hoping it is nothing serious-one day at a time!
