Night Grammar

I am a curled up comma When I sleep, so give me pause. I’m sentenced to insomnia Which grips me in its clause. I’m subject to a poor night’s rest; That’s predicated on The fact that I have tossed and turned Each night that’s come and gone. Don’t question if I’m in control Or I’ll get out of joint And answer very forcefully With exclamation point. The night’s a restless period And though I barely sleep, My colon and its semi-friends My secrets somehow keep.