All I can tell is my own story. I was a 58 year old smoker and I went to my doctor the next day after first seeing blood in my urine. He tested my urine and the results were that there was no trace of microscopic blood in my urine (despite my urine being fire engine red!). I read all the Internet information that said most blood in urine does not turn out to be a symptom of bladder cancer, and that's true, no doubt. But after the blood continued on and off for about nine months, I went back to my doctor and this time he sent me for more tests and the result was that I did indeed have bladder cancer.
So, the morale of my story is that if the blood in urine continues on and off either tell your doc that you want more tests or go get a new doc.
08/16/16 - TURBT - 1 tumor, T1HG, 7.5 cm x 7.5 cm x 1.8 cm, non-invasive papillary.
BCG treatments (15 doses total - last March, 2018). As of latest cysto, As of May 4, 2023 - cancer free!