How do I know if my water broke?

As I was vomiting just now I felt liquid come out. Sometimes I pee when I vomit but this felt kind of different, also I had JUST peed before I threw up and usually if I do that, I don’t pee when I throw up. I was wearing a big pad at the time (thanks to peeing when I sneeze) so I’m not really sure. If it’s my water will i definitely know? Will it continue to come out? Is it possible to not know? It was probably pee but idk. I’m due in a week, lost my mucus plug, and I’m 3cm dilated.