sleep problems

so every night i go to bed,  not really tired, but know i need to sleep- and then wake up 2 hours before i need to wake up.. no matter what time i go to bed, i always wake up 2 hours before i wake up.. i dont get it.. some thing must be making me up.. and i wake up completely awake, but when i try to go back to sleep and let my alarm wake me up again- i wake really tired and out of sorts..
:(
hopefully spring break will help with this..
along with the rash on my arm..