Hello. For the last month I have been feeling a mild discomfort in the middle of my chest. It comes and goes and it's somewhere on the inside. Sometimes it last for a few seconds but comes and goes every few minutes and then won't get anything for most of the day. It is hard to describe and can't say that it is painful but more of some sort of squeeze/very mild pain/pulsating feeling and annoying. Every time I do get it, I can feel my heart beating. I thought it would go away but now I am going to see a physician immediately. Does anyone have any idea what this could be? Thanks.