Awake at three a.m.
Sleep driven far away
made impossible
by racing thoughts
an endlessly beating heart
and restless tossing upon the sheets
while lips voicelessly form
the same question
that tormented me last night
And so many nights before
I don't think I've ever read a work about this subject that sums up several hours so succintly. I think you got your state across well and yet in such a short poem. I liked this.
The only line I had a problem with, was the last one. I felt it sounded clumsy. I think "And many nights before", or something like that would sound better.