For the past 2 weeks I have experienced moderate to severe pain in my back right side. This pain makes it hard to sit or lie down but rest helps considerably. It began when I had a so-called 24 hr flu that resulted in vomiting throughout the night. I thought at first it might be a cracked or broken rib. I've been to the doctor who could not diagnose this condition but ordered blood & urine tests (I have not heard these results yet). I am becoming concerned.