Watery CM? (TMI)

I am due for AF today and I was cramping a little bit a few hours ago. I was standing up and I felt a warm gush "down there" and I thought "Noooo, I'm out for the month!" but when I took my pants off to shower, I had white, watery CM just dripping out of me. I know it's not an infection or anything and I haven't taken a hpt. Anyone had anything similar in the past?