Ay, mahirap sabihin lang based sa description, mama! Better to send a pic or describe it more, like is it thick and yellowish, or may blood streaks, at ilang cm approximately, kasi ang mucus plug talaga ay parang cork or blob na whitish-yellowish, sometimes with a bit of pink or brown, at it can come out as one or in pieces. One of my mum friends thought she lost hers at 38 weeks tapos false alarm lang, so definitely message or call your OB para ma-check, especially since you're already full-term, they'll know right away kapag nakita nila, at they can also check if labor is coming soon!