Hiya CJ,
I get rapid heartbeat, thumping heart beat, skipping heart beat, heart palpitations, fluttering heart beat,... Well you get the point lol And it alwys seems to get worse when I am stressed out. But I agree with Danielle that if it is really annoying you there is no harm in having it checked :)
I suggest you try out the program here. It helped me a lot! And when I am less stressed my body responds accordingly so I figure it is worth a shot :)
Anyway, hang in there, this too shall pass!
-Diva