How do you know when your water breaks?

Breanne • Baby girl due March 24th, 2016! 💕
I had a gush of fluid at 5 am, again when I woke up at 8 am, and now again at 1 pm. It's not pee and is kind of smells like semen which I read is what your fluid should smell like. I'm just feeling pressure in my lower back. It's been 8 hours since my first gush of fluid! When did you start going into active labor after your water broke?