Not sure how old you are but a few years ago I was waking up every single night at around 2-3 AM then every hour after that, it was awful, I prayed for sleep! It also felt as though my body was "shaking" my nerves felt on edge, sometimes would have to jump out of bed.

Did some research and I am sure magnesium has helped me, I take the powdered form in the AM and again in the PM and started sleeping well again, might be worth you trying it.

Also taking epsom salt baths helps me.