Flower,
Many have come here as you just have. I did. Welcome.
Far and away, the odds are you do NOT have bladder cancer. There is a long list of more likely causes.
The doc is doing the right thing, working you up to rule out bladder cancer (or other cancer) - caught early, bladder cancer has a good chance of being cured or controlled.
You are already doing all you can - you made the appointment and you have a plan to find the cause of your symptoms. *IF* it is bladder cancer, you can expect nothing is going to change over a few weeks. Work with the Doc.
Easy for me to say - RELAX, you will know much more after the CT and cystoscope. In the mean time, read the positive reports of treatment in the forum.
Best,
Jack