Mrs. D, you have so much info, its seriously appreciated. Thanks.

so I've been up all night so far with my feet/arms/hands burning , but what is worse are the palpitations and heart rhythm. I feel the entire bed shaking from my pounding heart and it either is pounding way too slow, skipping beats, or, by a slight move, racing. What are the best ways to deal with this?

I'm new to these autonomic symptoms and they really freak me out. My neck even hurts from the heartbeat.