What Causes Blood In Urine With Pink Spots In Bladder?

I had blood in my urine in the middle of the night with all the symptoms from a bladder infection (I ve had them before). But, I never had blood in my urine before. I saw a Urologist & was examined. There were pink spots on my bladder & the lab said it was not cancer. It could be from an irritation. I wondered if I passed a bladder stone when I was on the toilet for 3 hours that evening? I am to be re-examined in the beginning of June to make sure spots are gone. Could the blood in the urine have been from my passing a bladder stone? Guess I m concerned about bladder cancer. Thank you.