I hear ya. I have felt like this the last week. Just as soon as I think all is fine. Wham...there are those heart palpitations again and then instantly the flushing face and racing pulse. Then after an hour or two of all this...my heart rate drops, but I am left purely terrified that my heart will go into one of those episodes again. I feel "keyed" up, if I allow myself to stay this way in a state of terror...then the cycle starts over again...sometimes within only a few hours. I get into a vicious circle. Which comes first the palpitations or the fear of them? What I keep telling myself is that I have them often and otherwise besides extreme fear from feeling them nothing else is happening to me. Breaking that cycle is hard. have you seen a doctor to have workups? If they don't find anything, and even if they do it most usually is benign(not life-threatening.) I really am having palpitations, but they say they don't mean anything, that a lot of people have them. But heightened response to my bodily feelings makes me more aware of them. May be this is your case...but your Doctor can help you deal with them with medications one way or the other. If it helps to know I am, currently, in one of those week long attacks myself and trying to "dig" myself out. I've had them in the past for long periods to a time...very wearing and tiring. But I only get these long ones only once or twice a year. Last year I had none....just little 10-40 minute ones once a month or so. I hope it breaks soon for you. Keep us posted on how you are doing.