Welcome! We have all been where you are, so we understand what you are feeling. I joke (only partially) that I didn't even know I had such a thing as a bladder!
The good news about many small papillary tumors is that they are low grade (meaning that they grow and spread very slowly) and, when caught early, are very treatable. The bad news, as you have read, is that they do tend to recur. No one knows what the time frame might be. Some come back very soon, some not for years, and many not at all.
This is why it is very important for you to keep your appointments for checkups. Usually they are every three months for two years, every six months until 5 years have passed, and then annually. This ensures that any recurrences are caught ASAP.
I am now over six years out with no recurrences. It has gotten so that I don't think of it often, but as the time for my annual checkup approaches I always wonder what they might find.
Wishing you the best of luck on your exam!
Sara Anne