It is extremely unlikely that you have had CIS (carcinoma in situ) for almost 6 years. CIS is high grade and rapidly growing and spreading. It would not have "stayed the same or better."
There are many other causes for symptoms such as yours and I would expect that your urologist would have discussed these with you. If not, then you need to initiate the discussion.
Again, I would emphasize, that it is very unlikely that you have bladder cancer!
Sara Anne
Diagnosis 2-08 Small papillary TCC; CIS
BCG; BCG maintenance
Vice-President, American Bladder Cancer Society
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