On the point of worrying about cancer everywhere, it sounds like both of you are early on so the probability of it being anywhere else is very low.
Of course the docs will do some scans to check that but worrying about that isn't go to help it go away or change the facts. Worrying does cause stress on the body and mind so it does have a down side. However, I understand it is kind of like me saying "No matter what you do, don't smile." You will almost be compelled to smile. SO...it's ok to worry some but don't be consumed with worry. Spend time researching, but not all willy-nilly all over the internet. We have lots of good information in the information section of this website and there are links to other reputable sites.
It doesn't hurt to share you concern with the doctor. He/she may be able to explain more. Other people here on the site may as well.
Dpoe: We (you, me, anybody else) don't even know if you have bladder cancer for sure if you haven't had an actual biopsy, unless I'm reading your post wrong. You really should get the info from your doctor right away. Questions: Doctor, do I have bladder cancer? If he says yes, then: How do you know? Please send me the pathology report. Did it say high grade/low grade or what? Were there sufficient margins to get staging?
If you don't ask, some doctors don't seem to want to tell. If there was a pathological evaluation done it would most certainly be back to your doctor by now. Those records belong to you and you should get copies of them. You just need to sign a release that you give permission for you to see your own records.
Might be you don't have bladder cancer. Might be one small occurence of low grade cancer.
Mike