I get those too! I started with anxiety a few years ago and that is when I started with the palpitations. It is sooooooooooooo scarey! and people think I am crazy!I kept going to the doctor but they couldnt find anything wrong except I am hypothryroid. When I exercise it makes it even worse, which makes me scared to excercise! NOT GOOD! I Hope that at least you know you aren't alone , but I do know how scarey and frustrating it is!