It must be difficult for u to experience these kind of  symptoms, however since the urologist and surgeons say nothing is serious, it's a good thing.. But u can consult a Psychiatrist for help since u seem to have a psychological disturbance...

Agree with Dr Deepthi . You need to consult a Psychaitrist for further management as pain centres are in the brain and lack of organic causes as already ruled out by Urologists. Next step is to see a Psychaitrist. No you aren't mental or weak. Please don't stigmatize this issue and suffer . People see us for these kind of problems regularly and Psychiatrists are trained to handles these and guide you properly. Don't suffer in silence and feel helpless. You can get better soon.

Kindly consult for treatment