question: Hi, I have tightness in my upper chest sometimes, and it s sometimes hard to breath it s like I have to sit up grasp for air, when I work out it doesn t bother me most times it s when I m not as active or mainly inside. I ve never had a EKG or a CAT scan or a PET scan all I know is that those are my symptoms and that my heart also tends to race a little. I am 16yrs old good/great physical condition and 140 5 4