Please help, After a night of heavy drinking at a birthday party. I passed out in my bed. I awoke to find that I had a pressure / pain in my back. This was just above waist level Left side. This pressure has gotten intense many times and I have gone to the ER. I have had MRI with some kind of die and then had a sonogram. Still they have found nothing. This pressure / pain has now seemed to move up my back, left side. This has been going on aver a year now. What is wrong with me? I have not drank alcohol. I have not drank and fluids. I have fasted. I have eaten just vegetables, uncooked, then cooked, soups, meat, no meat. Nothing seems to change it.