So I've read several sites about how to deal with anxiety and i discovered i have death anxiety. It all fits perfectly. But i am confused. Sometimes when I am content and fine and happy I feel my heart rate increasing alot. And then sometimes it feels like my heart is going to stop but my pulse is there. Strong and fine. And Idk why I have heart palpitations with no troubling thoughts. Can someone help? Also I've noticed when I am sleep deprived or take a nap in the afternoon its worse. Can someone help?