On Call

I'm on call and I cannot decide if I attempt sleep to be woken up by an unfamiliar ring tone, stagger to my work laptop and release some documents that have to be taken care of before tomorrow, or stay awake and wait. I'm really tired. I have already seen a few emails come in, they are on the hot list; however, no one has called me regarding them so I am thinking they can wait until morning. I already caught an error on one and emailed a reply. Mmm...my only concern is that I sleep through the call or the reception fails (which my being awake cannot fix)...I am expecting at least one call and they said they would do so by midnight.