Mine was very obvious. I basically heard/felt a distinct pop when I was on the couch, ran to the bathroom, and it came in a giant gush. Everywhere.
The night before I had something similar to what you're describing - I peed, stood up, and a little extra came out, which didn't seem like pee. My guess is that maybe it was a small tear.
ETA: I did call about what I had felt the night before, OB basically told me to do the pad thing, but I never had any more leaking.