I don't have any advice, but I will share my experience with you.
One of my snakes did this same thing a few months back. She would empty her water bowl daily, and pee every night. This lasted about a week and half, and just when I really started to freak and was ready to call my vet, she stopped. She has been normal since then!

I have no idea what that was about, though. Don't hesitate to call a vet if you are concerned! I certainly would have if it had gone on any longer.