Cheryl,
Welcome to the forum. Responses here come from others with bladder cancer, not doctors, thus medical advice is not offered here. There is a good chance that the growth is not cancer, or if it is, that it is local and treatable. Suspicion of cancer is so scary when a doctor says it unexpectedly.
The good news is that you have found the growth, and that you have a plan to deal with it. You have not received bad news so far. You have an apparent tumor that has not been shown to be cancer. There is no need to assume the worst.
You are on the way to a full workup to determine the nature of the growth. Until a biopsy is taken and the pathologist report is received, you will not know the nature of the growth. It may be a month or more before you know. Waiting is terrible - we have all been there. We want answers NOW, and that rarely happens.
Try to relax, and wait for the biopsy report and then a treatment plan if needed. We know you can't relax - neither could we. In hindsight we do know that worrying does not help.
Focus on the fact that the growth is not necessarily cancer. You need and are working to get more information. You are moving in the right direction.
Read other peoples experiences and comment and ask about any issues here.
Best,
Jack