text: why i'll be having chest pain? i thought it was slow sign of a heart attack but is not b/c i went to the hosipital and doctor said it not..so that good new.. 'but' evertime the pain come back it hurt like a knieve is stabbing me in the left handside of the chest . can anybody answer my question? are you under any stress?  is it in your pectoral muscle?  if it continues go to the er.