OK so I been walking a lot lately I just turned 37 weeks today and my doctor said she thinks baby…

OK so I been walking a lot lately I just turned 37 weeks today and my doctor said she thinks baby will come before 40 weeks. and I just went to the bathroom and wiped and a big glob of mucus plug was on the tissue does that mean I'm progressing on to labor? I also been having contractors on and off since Monday of last week.