It's possible. I never lost my plug in the sense that it came away all in one go (though I did have loads of clumpy white mucus from probably around 32 weeks) with my first. But about 24 hours before labour started, I had loads and loads of clear EWCM. My friend who is a doula calls it 'baby goo' and it's very common just before labour. It was excessive, so much I thought I had an infection or something. I went to bed that night, woke to my waters going, and my daughter arrived 11 hours later. So it's certainly possible. It depends on what's normal for you.