I have developed this physical anxiety (tight chest, a reactive heart, knot in my chest) for one or two weeks now, and I dont know what is causing it. I've ruled out the most obvious and common stressors from my routine that could have been causing it, the only thing left to rule out is coffee. I drink 2 very strong cups of coffee, it helps me keep my appetite in check, thats the only reason i drink it at all. Tomorrow i stop drinking coffee altogether, and i'll know in a couple of days if its the culprit. until then i wanted to get your opinions on this subject.