Although your responses helped me greatly for several days, I am once again scared. I know you all say what I am going through is normal, I'd like to know if what I am going through today, is also normal. Today I have, besides the normal run of palpitations, several times just had one big thump that made me short of breath and lightheaded for a few seconds. I also felt, I don't want to call it pain, but pressure, sort of like when you get a gas pain, in my chest at the times of those huge thumps. Please tell me all that is also normal.