Uhh- the thing about not knowing you're sleepy until you fall asleep is not normal. The other discussion in this thread about whether or not its morally OK to d

Uhh- the thing about not knowing you're sleepy until you fall asleep is not normal. The other discussion in this thread about whether or not its morally OK to drive drowsy does not apply to your situation. Definitely do not drive until you've had a sleep study done and been cleared by a doctor. The usual situation that is being discussed in this thread is where you are already tired and drowsy and decide to drive because you don't have a choice. Your situation sounds like a different medical condition of some sort, and (not a lawyer but) the fact that you are aware of this condition might mean you'd still be guilty of the same crime as someone who decided to drive when drowsy and fell asleep before causing an accident.