For the past few nights (it has happened before as well but a few months ago) while trying to fall asleep I get this weird feeling that I guess could be described as squirmy, tickly, restless, and it makes me feel like I need to stretch to release it but it never works so I just end up tossing and turning until it goes away. It also occurs during the day (as I am feeling it right now!) but usually when I am lying down) What could this be?