How is it?

How is it that I can be up all night long with contractions 5 minutes a part or so...fall, asleep for 2 1/2 hours and now nothing? What was the point? Ahhhh!!!!!! I know the end is near and that gives me hope, but truly...all night? Was that truly necessary? Brett is hoping for *the* phone call today at work, and I'm hoping for a nap...lol!