39+4- leaking or discharge?

I've been wet lately that midwife thought was discharge because it's not so consistent. Well this morning I've been having a little more and been watching it. I checked and seemed normal. 5 minutes later I got so wet it went through to pants. It was mainly liquid but had a little bit of white discharge. Waiting for doctor to call back but what do think based on your experiences? In past appointments doctor said to put a liner on and if it goes through then it's water but from reading on here some women only get small leaks that weren't enough to fill liner