What could be wrong if have severe flan pain, go to hospital, and they find one of your kidneys bleeding into a sack attached to your kidney and they find fliud around your lungs as well. Symtoms that lead you to go to ER: extreme flank pain. The hospital admits you, does tests then discharges you to home saying they don t know what is wrong, and they m ade an appointment to a specialist of unknown type. You have b ecome so weak, you know need walker. Before acute pain began you were 68 year old professional working man ( week earlier) hx of chronic back pain that they thought was osteoarthritis, and precribed medical Marijuana to take prn, which helped last 2 years. No other symptoms.