questions, questions, and still more questions

Hi! We are new and just feel overwhelmed at time....

So my husband got up one night to go to the bathroom (half asleep) and thought he saw blood when he went but when he went the next day all was clear so he thought he imaginged it. About 2 weeks later he noticed blood when he finished urinating. We scheduled an appointment with uro. This went on for4 days. We saw the uro and he did a an exam Iincluding checking prostate and didn't find anything but ordered a ct and cycstoscopy. We scheduled the ct and then scheduled the in office cystoscopy the next week. Four days after ct we got a call the cystoscopy now needed to be scheduled in hospital under general anesthesia with a possible TURBT because they saw what they thought was a tumor on the ct. We had the surgery and went back 9/18 f8r patho report. He is diagnosed with a 1.3 cm stage TA low risk papillary carcinoma. Our uro's normal protocal is just follow-up flexible cystoscopy every 3 months for at least the first 1 to 2 years then less frequent for 5 years total. We brought up BCG to help lower risk of recurrence. He said yes it can help lower recurrence by 1/3 to 2/3 times and if the patient wants this approach they will do this. I guess my big questions are if the this will lower recurrence by such a big percent why wouldn't that be protocal? Are there serious side effects we need to take into consideration before proceeding? (We were told the normal side effects are minimal and the scary side effects are so very rare). We were told that he may feel burning, urgency for 24-48 hrs after treatment. Is one round of once a week for 6 weeks enough for this stage/ grade? I've read so many conflciting standards I am not sure anymore. Thsnk for and responses, opinions, or experiences!