i am 19 i get it also but its been freaking me out. i got an ecg done at my local gp and he said it seemed fine but wanted to look at it further becausemy uncle died with something wrong with his heart when he was 26. as far as i know the tablets make my heart go a bit funny too. even my hands go wierd like just one finger will go freezing cold then the ohters will be warm . its just wierd. i guess i never noticed these things before the panic attacks and derealization because i had nothing to worry about . now i think every small pain is going to be a fatal one take care