i know this feeling.
You might find that kalms help. They are herbal, so no risk of addiction or anything like that. They have helped me at times of stress.
There are other things I might suggest had you said you were having problems getting to sleep, such as getting a good solid routine, not stressing about not sleeping, picturing yourself in a white room and inspecting it, drinking warm drinks before bed, having a warm bath before bed, etc, but im not sure any of those might help.
in your situation i would try kalms, if you can.
also, is it anything specific that wakes you up? like nightmares? or certain noises or anything? maybe if you could figure out what it is it might help. also, how often do you wake up? the bodies natural sleep rhythm lasts 90 mins, so if you wake up every hour and a half that might be why.
anyway, good luck