I can feel it beat faster than normal and can feel it move, and its a very uncomfortable feeling , first i thought it might not be anything serious because it happened only once or twice a week but now it happenes every few minutes say every 30 minutes and also i can feel a little pain in my chest...Last night i suddenly woke up in the middle of the night because i could feel my heart beating faster than ever and i felt it against my chest , felt like someones beating from inside my chest, and i was sweating like hell it was so unusual. what can it be, something dangerous ??? No im pretty sure that it wasn t because of a bad dream or something and it wasn t that normal thump thumping, my left arm z hurtin aswell. bdw im still 20 .