Cervical mucus out of whack

So this is out of the norm for me. yesterday(4 days to AF) while checking my cervix as I always do, I noticed an abundance of cm which was almost like milk boreding on lotion. My cervix was height soft closed like pursed lips all day. Today (3 days to AF) it almost clear slight lighter then yesterday but the are tiny little globs of like jelly mixed with clear mucus more so around my cervix were as yesterday it felt like AF was coming. I was just wondering why it change over night and why it when from milky and heavy to watery jelly and slightly lighter. Usually in the run up to AF I get light amounts of milky cm the go dry a couple of days before.

Any anecdotes any one might have will be a massive help