34 weeks 5 days

A while ago I felt a small gush of fluid, I checked my underwear and it was just like wet.. But it wasn't discharge just like a water stain ..& it wasn't pee.. It didn't have that odor smell.  I called labor and delivery they told me to wait and hour and see if it happens again to call either way if it's does or doesn't happen again. Has this happen to anyone .. And what happen ?