Ay, exciting! Honestly, it could be, pero hindi lang yan sure sign na malapit ka nang mag-labor, some moms lose it days or even weeks before labor starts, kaya pwede pa talaga mag-take ng time. Better check with your OB para ma-confirm kung mucus plug talaga at para ma-monitor how you're progressing, especially since 39 weeks ka na and that's getting close na talaga!