I shake internally almost all of the time. I sort of assumed it was because I have great difficulty visibly showing emotion of any kind (emotions/feelings were a weakness). A way for the body to work off the excess adrenalin I guess. It does get worse the more stressed or upset I get.

I also shake externally but that is usually when I am in complete panic mode and am losing control fast. However I always keep a figiting toy around so that I have something to do with my hands and I always tap my foot (even in sleep).

Jet