It's comforting to know that I am not the only one with this problem. I'm 32 years old, and I think mine started when I was about 12 years old. I remember a girl in my school who had sudden cardiac death during PE, and my Grandmother telling me not to run because I could drop dead. Shortly after that I started to notice myself having palpitations or flutters. I have been to several doctors, but the only thing that they have caught on a monitor is PVCs, PACs, tachycardia, and a "sinus arrhythmia". None of them ever seemed to concerned about it, and since I haven't had insurance in ten plus years I can't get them to do anything anyway.
The skipped beats do run in my family. Both my Mom and Grandmother have had full cardiac workups several times and they all came back normal. Since this all started to get bad for me in 2010 I have not been able to go more than a mile outside my neighborhood without fear of dropping dead. I get weird sensations that send me into a panic sometimes, the most frightening being the couple of times I started to feel faint, and went to feel my pulse only to have nothing there.
No one takes me seriously, not friends or family, or even my partner. They all think I am crazy, and I'm starting to feel that way. I have had some measure of relief by quitting smoking, walking, doing yoga, and meditating, but then I get a flutter and it starts all over again.