My heart races after I eat lunch every day. I always eat the same thing - a sandwich, an applie pie thing (one of those small ones you get that comes in a paper wrap), and a bottle of tea. It races for a while and makes me feel really weird.

It also happens sometimes randomly, not necessarily after I eat. My heart will start racing for a few seconds. I get really hot and really cold at the same time. I get mildly dizzy, I can feel my heart in my chest with my hand to my chest, and then all of a sudden it goes away.