it's 2:30 AM and I couldn't sleep. I read this discussion a couple of days ago and saw the responses and just let it go ...until tonight.
The tingling in your arms and legs could well be something to do with energy flowing through your hands, but usually this happens when someone is doing a healing rather than when someone is just lying still and trying to go to sleep or sitting in a chair.
I am NOT a Dr but I do know that a pinched nerve in the neck can cause tingling/weakness/shaking/numbness in the hands
Also neuropathy (sometimes caused by diabetes) can do the same thing.
Now I really hope I am very far wrong ... but you might want to mention this to your Dr just to be sure it is not caused by some medical condition.
There I said it. Now maybe I can sleep.