Suggest Treatment For Pain In The Ribs And Sternum

I have been experiencing some periodic discomfort in the left side of my upper abdominal area over the past 9-10 months that was diagnosed at my last physcial as heart burn and for which Prilosec was prescribed. I tried the full course of Prilosec, but it did not seem to provide any significant change. I also have noticed some tenderness in the area of my upper rib cage on the immediate left side of my sternum. Just in the past 2 days I have had several episodes of rather acute, but brief abdominal pain in the same general area. I have just scheduled a routine physical for next Wednesday with my existing family practice clinic, but wondered in this is something that might need more immediate diagnosis and attention?