What do you do when your sleeping pattern is out?

[xespac]

I notice atleast once or twice a week I would wake up out of no where... an start twitching and my heart would have pins and needles.... weird feeling.... went to docs and said everything is alright but my coloestorol is 8....which he said wouldn't be the problem....

edit: an I sometimes wake up out of no where and start shaking for like a few seconds - but so use to it that i just ignore it and go back to sleep...anyone have this problem?