In the right hands a cystoscopy will be painless and over in a minute, in the wrong hands it may be slightly uncomfortable. You can get a rough idea of your flow by urinating into jug or vessel and timing how long it takes. Then measure the amount of urine and divide urine ml by seconds. Eg 300 ml/ 30 sec equals 10 mls/sessions.
If you check my profile you will see three and a half years on I am still having issues.
Hope your problems are much simpler.