Jodie, I would urge you to go out and get the biggest, juciest, most expensive cheeseburger you can find and ENJOY IT! Whatever caused the change in the cells of the bladder lining that led to your cancer happened long ago and over a long period of time. You do need to eat a varied and healthy diet...everyone does...but in spite of what you may read in some far-out blogs NOTHING YOU EAT NOW IS GOING TO CURE THIS. I am not recommending a fast food, high fat, no fiber diet...far from it. But eating a normal healthy diet, with lots of good things in moderation, is the way to go. You need to have your strength up for whatever lies ahead.
You may have seen the articles in the news during the past few days. They state that a largest percentage of cancer cases are "bad luck" and not the result of specific events. It has been shown that smoking is one factor that leads to bladder cancer, but many of us have never smoked and here we are.
To answer another of your questions, THERE IS NO WAY TO POSITIVELY DIAGNOSE BLADDER CANCER EXCEPT A BIOPSY. There are tests which look for cells in the urine that are useful, but often give false positives and false negative results. Therefore they are used in addition to, not in place of, biopsies. But if you are going to have BCG treatments, when your bladder has healed from them, the urologist will do cystocopy and look at the bladder where the cancer was. He will not need to do a TURB unless it appears that the BCG did not work and he needs to assess the entire situation.
A CT-urogram is a CT scan of the bladder, ureters, and kidneys to be sure that there is no sign of cancer there. My urologist orders one of these every five years.
Those of us who moderate and/or reply to posts on the Forum do it because we have been where you are. I remember feeling helpless, discouraged, and terribly depressed. Many people here on the Forum helped me understand and we hope to do the same for you.
Once again, I urge you to relax a bit (hard, I know) and not agonize over what is past or diet or anything else. Your job is to be the strongest you can be and you will get through this.
Sara Anne