Are You Dry Right Before Your Period Are You Supposed To Be Dry Before A Period Starts?

Are you supposed to be dry before a period starts? - are you dry right before your period

I ask because I am one days late, and I have a lot of yellow mucus. I pray this is my month! We have tried for 21 months. I have increased cramping and my time! I thought a woman dries before a period starts. Have you or not? Thank you!