For about the last month I have been having pain in my right and left upper rib cage. Around the breast bone. This only happens at night after I have been sleeping for a few hours. And only happens on one side. Some nights my right side hurts, some nights my left side hurts. Never both side at the same time. I would rate the pain as a 3 out of 10 but still uncomfortable enough to wake me up. The pain goes away after I sit up for awhile. And taking deep breaths sometimes helps. Not sure what it could be. Any help would be great.