High Posterior Cervix

💎Dominique💎

I had a confirmed opk test with temp spike and EWCM. I'm 6 days from my expected period. My Cervix dropped low 2/3 days ago, and now today it is hiiiigh blending in to a posterior position with heavy amounts of cm.

It never goes posterior. And it's never been high enough to blend in on one side. O is very closed -

What are reasons for a posterior change?