hey lisa,
sorry you were asking about vitamins and stuff... you can get magnesium suppliments which help with the heart palpitations because it allows the blood to flow better through the arteries....or just eat more food that contains magnesium...
also there is this stuff you can get from like the chemist to help with anxiety... its called St John's Wort or something similar to that.... even valerian can be purchased there but that might make you a bit sleepy....
apart from that i didnt take any specific medication because i didnt want to rely or anything that i might get addicted too..
if you get your hormone levels checked you may find that your progesterone is low which is causing the palpitations...
i hope this has helped...
chrissy xoxo