I had BCG treatments 18 years ago and was just diagnosed in Sept. 2022 with cancer again. Tumors were removed and started treatment this morning. Lasted the two-hour wait and urinated. Didn't seem to expel much of anything. I have an enlarged prostate also so it's normally a bit slow going. After another 4 hours, I urinated again. This time I expelled more urine. It's almost 10 pm. and I haven't gone again. My question is how do you know if you have expelled all of the treatment? And what if you don't?