I get them, only when I am trying to go to sleep....or upon waking up, i feel like my whole body is vibrating from the inside out...it passes once I'm up and moving around, but makes falling asleep almost impossible.
Yes, I used to ge it a lot. I decribed it as "vibrating" as well because its the best way to describe it and like you its inside and just a general whole body feeling. Its stress and anxiety making your nerves go crazy. Luckily I dont get it too often now but it was a daily thing especially when waking up. I'd have to lay in bed for a few hours after waking up just to have it finally go away.