I don't think I pulled a muscle in my chest, but I could have. There are times when I move just right or if I exhale, the center of my chest hurts, where my sternum is. This hasn't been daily, but it has been more frequent and beginning to be more painful. A couple of nights ago, I must have moved in a certain way which made me wake up with this chest pain and it took my quite a while to fall back asleep. Does anyone have insight on this?
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