Hi JGriffin,
Diabetics are prone to sleep apnea and in fact sleep apnea can actually cause diabetes. Now this may not be what you have, but seeing a doctor and asking him about your condition and possibly conducting a sleep exam could let you know what's going on in short order, or at the very least rule out something serious.
This brings up a very interesting point about sleep deprivation, but I'll post this in a new thread.
Warren