If its different than normal I would go ahead and call just to be sure. I know some of my friends were kinda leaky and not sure- but it was their water... Good Luck and Labor Dust!
If it looks like water and is not sticky, it might be water breaking. My first two labors started with water breaking. One a slow leak, and one a massive dramatic pop and gush. ;-)
Re: and I almost thought today could be the day...