I work with urologists in the OR daily. I have seen hundreds of flexible cystoscopies. The amount of prep to get you ready for the procedure, is far longer than the procedure itself. The questions that can be answered by having the procedure for about 4 min max of possible discomfort (if you are without IV sedation or general anesthetic) are entirely worth it. If the surgeon diagnoses you with strictures, that likely can be dealt with immediately as an adjunct procedure. This may give you relief to pain you have been feeling for 4 years. All of what I have just said is based solely on what you have shared in your post, and there may be other factors unaccounted for.