I been diagnosed with pericarditis but i been having pain in my left arm. should i be to worried? also i been having a irritation that's been in my chest and in my throat is the like a side effect of it? I never had it before and its really making me worry because my mom died at a young age from a enlarged heart and now this got me thinking about heart failure and stuff. i just saw people talking on here and some of the stuff i read on anxiety on this website has me feeling positive3 about overcoming it but now im starting to have my doubts and its making me worse. any one can replay with any thoughts thank you.