Yesterday I Began Experiencing Pain On The Lowest Bone Of

Yesterday I began experiencing pain on the lowest bone of my left front rib cage. I thought it was an article of clothing I was wearing rubbing on the bone. Beginning this morning though, and now throughout the day the pain shifts from the front to the back of my left rib cage. I have not experienced any injury, etc. I have been gardening, lifting, pulling over the past week, although I have not been for two days. I sat down to do a search and thought I would try this novel idea of e-mailing a physician. I would prefer not to be on a mailing list. Thank you.