question: For about two weeks now I have been experiencing chest discomfort. It started after I ate a meal and the middle of my chest was squeezing.Now when I'm still, there is no pain...it just feels like the left breast/heart area is very heavy,However, when I bend down to touch my toes and inhale and hold my breathe, I feel pain around the chest. Once I exhale, it's gone...what is this?