I am now on my second round of BCG instillation for a non-invasive tumor. The first round very nearly eliminated the cancer, but a small spot remained. I did experience increasing irritation and urgency following each successive BCG treatment. I found that I can help eliminate the cramps, urgency, and burning by being pro-active. I take 1/2 of a 5 mg. tablet of Oxybutynin along with an antibiotic about 1 hour prior to instillation. Following instillation, I take 2 Axo tablets along with 2 acetaminophen. This allows me a modicum of comfort for the next two hours in which I have to retain the BCG. It helps me to keep it in for the prescribed time.
17 years ago, I was diagnosed with low-grade prostate cancer and underwent proton beam radiation. The treatment stopped the cancer, but the after-effects of the radiation likely caused my bladder cancer. My urologist said there was evidence of radiation burns on the bladder wall.
I have followed emerging information on the treatment of prostate cancer. Most likely, I would now be told to do "watchful waiting" as chances are, the slow-growing tumor would not have altered my life. Please keep in mind that all prostate cancer treatments have significant side effects. With surgery, you will likely encounter ED and incontinence. Radiation could make matters worse for your bladder. Although I am not a doctor, given the fact you are undergoing treatment for your bladder tumor, my advice is get a second opinion regarding what to do about the prostate cancer. Chances are you will be told that watching and waiting may be the best course right now. Research has shown that there is no difference in the life spans of those who have low-grade prostate CA and those who don't. A lot can depend on your age, however.
Best of luck! Hang in there!!