Ay momsh, mahirap sabihin from description lang! Mucus plug usually looks like a thick, jelly-like blob (sometimes pinkish or brownish from old blood), pero honestly baka magka-confuse ka dahil maraming discharge na nangyayari towards the end ng pregnancy, a few of us moms thought we lost it na but hindi pa pala haha. Best talaga na ipakita mo sa OB mo or mag-call ka sa clinic para ma-confirm, lalo na at 39 weeks ka na, mas peace of mind mo alam mo exactly what's happening, kaya go check with your doctor na para sure!