Beach wing chocolate

Does your cervix dilate a tiny bit when you have your period? - cervix when about to get period

Ok, my neck regularly to see that nothing goes wrong, guarantee, and I know this may sound kind of gross to some people, but when I am on my period because I checked around my neck and looked a little more than normal size should be expanded, and came the next day. I am sure, extend normal to a centimeter or two, but it is normal that no one before had such a thing?