Sounds like RLS, which in reality just means that you dont know how to sit still cause no one ever told you to and seriously made you.
dont worry, I'm the same way.
Mostly, I tap, or I'll be holding a pen and I'll twirl it in my fingers. Actually, I heard once that if you do it with a quarter, and roll it between your figners, over and under each finger, it sstupposed to help with something like coordination.
But then again, my uncle told me that, and he's usualy just talking out his ass about his own personal experiences.