I got a string of them tonite. IT was actually after having sex. I got about four of them. Its really scaring me and i think theres something wrong. cause it seems they are happening during the resting phase of excercise.. I think thats a signal for heart trouble. ill get 1. then a couple mins later another .. few mins later another. and it happens about 3 or four times. .. Im very nervous about this .. I think i need to get the holter monitor