Hi Christine!
I'm sorry to here about your pup; I know this is a very difficult time for you.
My Annie has been living with TCC for nearly 3 1/2 years now. She just recently had her first bladder infection that caused her to urinate blood and I was very very disturbed by it, so I can really sympathize with you.
Annie was treated with an antibiotic and that cleared up the infection and THAT cleared up the blood. All this time Annie has been treated only with piroxicam and it has served her well.
Spanielmom seems to know more about TCC than anyone I have ever read on this board, so I would take her counsel to heart. I also believe it is VERY important that you see an oncologist to figure out your course of action. I think if you read through the many postings, there is one that mentions an oncologist who your vet can contact--you might want to try that.
Stay strong, Christine, and enjoy every second you have with your baby.
Good luck
Marty