Good evening. My name is Mary. This morning I woke with a mild pain located almost right between the shoulder blades. I thought maybe I pulled something working out, but then I had mild indegestion toward the afternoon. It almost felt like a bubble that needed to pop midway, like right around the breast area, but inward more (every once in a while, my sternum "pops" if I accidentally move in the right direction, and it kinda felt like I needed a "pop"). I'm still uncomfortable tonite and a little scared. I hope this has nothing to do with my heart, which my Drs have recently said sounds pretty good. The feeling got worse with stress, too. Tonight, my teen started arguing with me and I felt that spot get tighter. I still have the feeling somewhat of a bubble needing to "pop". I hope this makes sense. I just don't want it to be a serious issue (I do tend to worry, if you can't already tell). Thanks.