for the last month I have had a pressure feeling in my chest between my breasts, it is constant. I ve had a ekg and a stress test both results are perfect, the pressure is constant. I also feel a pressure on the bottom inside part of my mouth, under my tongue, and sometimes my lips tingle. Now in the last two days I have a strange balance feeling, like when you have spent a few days on a boat and then come on land that tipsy feeling..any ideas? Otherwise I am an extremely active healthy 53 yr old women with no real health issues