I've had pain in my side that doesn't go away for several months. I had a visit with my dr and she suspected a kidney infection, so she ran tests which were negative. I'm going to see her again Wednesday, but I just can't figure out what could cause such intense pain in my side. I'm not having any other symptom. No loss of appetite, no gastro problems, etc. No fever. I am having to take either tramadol or norco once or twice a day to be able to function and sleep. The pain still wakes me up at night. Any ideas?