Hi am having trouble with my breathing for week now and i have heavy feeling on my left side of chest and wake up with a very fast heart beat at nigh?

Should see your MD: Given your age, less likely coronary art. Disease, but you may have an abn heart rhythm, which can cause these symptoms. May be your thyroid also, but there are several other possibilities, including muscle injury. Given the possibilities, you ought to be seen by a physician. Poss tests: ekg, chest xr, thyroid blood test, p'haps stress test, echocardiogram.