Hi everyone i'm so glad I found this website! Iv'e been having some symptoms that have really scared me .Iv'e been having heart palpitations suddenly out the blue, when im standing or if I get up suddenly .They don't happen when i'm relaxed, so dose this sound like anxiety? I know iv'e been under alot of stress lately, I've only had this happen twice before ,which is why it's frightening me . Has anyone else had this ? . How Do I stop it happening?