Since last few days i was having bloating problem. Then yday night i started having abdominal pain in center(Just below the rib cage) Then the pain spread to my back also. Around the same height.. below the rib cage. It was quite severe pain so finally took anti inflammatory pain killer volterine. The pain subsided with that and hasn't come back since. But I am still feeling some very slight discomfort in my back right side. what could be the cause of pain in abdomen and back at same time?