I am 21 years, from 4 years I have a problem in my bladder, I feel I have to pee every few minutes, I have seen 17 doctors, have done all urine and blood test, all is clean, I have done also mir, nothing is seen, also I have done cystoscopy, and nothing there, even I have take too much nervous medicines, and had to put urinary catheter many times, I don't have a neurogenic bladder, also a pain in all my back from months and without reasons, what is the problem please, what is the treatment?