I’m so sorry, I too had the pain that radiated upwards through my whole body. Every time I would urinate which was ever 15 minutes it started on my fifth treatment was severe on the sixth treatment, thank God it was my last treatment I personally would not have been able to continue because the pain was that severe. My urologist was not sure what it was stated I could be having a reaction to the BCG treatment. All I know is there is no way I can do the treatment again not that type of pain praise God my three months cystoscope came back clear I go back in October for a repeat. I am praying for it to be clear as I said I do not believe I could do the treatment again not with that type of pain so I do understand and my prayers are with you.