Hi,
Actually I don't feel anything wrong with my bladder once the BCG effects pass (which are still here today, 24 hours later, which is not normal for me)... it is very easy for me to forget I have had three recurrences of bladder cancer completely, until the next time I have to pee in a cup, get invaded by a scope, or entertain toxic substances internally!! And for this, I am grateful, that I can focus on doing things to prevent cancer like avoiding some things, eating other things, and keeping a very positive attitude.
I will very kindly say that perhaps your thoughts about cancer in general could be causing you to feel weird sensations in your bladder between treatments. I went through that weirded-out phase after the original large tumor was removed from my bladder. I wondered how something could grow in me for so long, and I never knew it.... I thought too much about cancer being so silent, was it growing again, was it changing into something more deadly, etc... there's no way to tell someone how to chase those thoughts away, I'm afraid. But if you can, then you just go from day to day trusting in God and your doctor to keep the monster at bay.
Be strong, remain fearless!
Lauren