It's a plug that protects your cervix and the fluid around the baby. Think of it as a corkscrew in a wine bottle. And if.you do lose your mucus plug early...don't worry. It can rebuild itself
Whats a mucus plug and how do i fix it
Milky white, clear, or if it's staining your panties yellow it's normal. If you notice a smell that's not normal for you or if it's green then it could be an infection. Brownish or tinted with a little blood is probably your mucus plug