For the past five years, about once a year, I get a severe pain in my right lower side of my back. I go to the doctor or insta-care every time and they always send me home with loratab thinking its just kidney stones....but I never pass them. The next day I always feel fine. Well last month I had the severe pains, I had some loratab at home and took one and was just fine the next day, well instead of waiting the year for the pain to come back, the pain came back les that 2 weeks later. I went to the doctors and they did an ultra sound and found nothing that didn't belong, in other words, its never been kidney stones. After a couple of days, I started noticing that if I held off going to the bathroom for too long the pain would come back, if I really waited to long, the pain would have me down on the floor, but within an hour or 2 i was gone. I don't really have the money to keep going to the doctor time and time again for tests, I would like to go to the doctor with some possibilities already in mind, anyone have any ideas? What is wrong with me?