Ay, ang mucus plug talaga ay parang sticky, jelly-like substance na nag-seal sa cervix mo during pregnancy, kaya if nakita mo siyang pumipitik or may bits na lumalabas, that's actually a sign na your body is preparing for labor na, it can happen days or even weeks bago magstart ang actual contractions. Best to message your OB or go in para ma-check agad, lalo na kung may bleeding or cramping kasama, para makapag-prepare ka na mentally at physically!