TMI!!!!!

TMI but ... my vagina is extremely tight and closed. I could barely get my finger in there. My husband and I tried BD(just for fun) and he just couldn’t get it in the way he did before. It was odd. And he was telling me that he’s never felt it that tight before. My AF is due in 9 days. Does anyone know what this could be ? I’m also having thick creamy white CM.