About your hands going numb at night... Do you sleep on your stomach or side with your arm under your pillow?

I did this, too, and I know it's comfortable, but try not to do this (as you're trying to fall asleep, anyway)!! Keep your arms by your side if you're on your stomach. If you're on your side (or back), I'd recommend a pillow or body pillow to keep the circulation moving in the arm on top. Injuries need fresh blood to heal... decreased blood flow at night is bad