Cystoscopy is nothing. I would rather have that (and have had lots) than dental work, even a cleaning (although my late husband was an oral surgeon, or maybe because of it, I am dental-phobic!)
In fact, I wonder that cystoscopy wasn't done prior to a CT scan, which exposes the patient to a lot of radiation. It isn't pleasant, is slightly embarrassing, but is really no big deal. ESPECIALLY WHEN YOUR LIFE IS AT RISK.
Go and get the cystoscopy over with. If you are nervous, ask for a light sedative prior to it. It takes about 15 minutes and then it is over.
Good luck to you.
Sara Anne