So i'm unsure if what just happened to be was pb or just throwing up Water. Fair warning the description is kind of gross:

About twenty minutes ago I felt like I was going to throw up even though all I had was water. I tried not to and went to sleep but then woke up and ran to the bathroom knowing it was going to happen. Just as I made I started making these repeatative belching noises and water was coming on. I have no idea if it is PB'ing, since I have never done that, or just throwing up water. Can anyone help me with this? Should I call my doctor in the morning? I've only been banded three weeks, I don't even have a fill yet.

You should certainly call your Dr in the morning. I don't know how much water you drank or if you did it too fast but being sick to your stomach should not happen with just water. PB'ing is a result, often, of food just not moving or eating it too quickly. If all you had was water and you didn't drink too much of it or too quickly it might be a bug. It is always ok to check with your dr if you are concerned about something.