Post Radiation Therapy - Blood in Urine

Following removal of my prostate, I had 40 sessions of radiation therapy to the pelvic area. The radiation therapy was concluded in 2018. This past week I have noticed 3 instances of blood in my urine. I was concerned enough to contact my urologist, and he reassured me that he believes it is a result of radiation from 2018 and nothing serious.
I did some research and found a site that may describe my condition. It is called radiation cystitis, and the site stated that 1% to 2% of men who receive radiation to the pelvic region will experience bleeding 5 to 20 years later, due to injury to the bladder during radiation.
My question to any of you fellows out there who may be in that 1-2% with me: "How long did the blood in the urine continue; did it stop on its own at some point? And did you require any medical treatment to get it to stop? I would appreciate any responses.