I remember being up at this time feeling like I'm dying. Googling when's it gonna end over and over on every drug forum. Imodium AD, smoke some weed, fall asleep walking to the bathroom and thinking the dream was real.
You'll be OK. Soon enough you'll just be awake at this time feeling perfectly fine because you took to long of a nap and still need to eat and then you go back to bed and it's not sweat soaked and your legs aren't twitching.