Closed cervix?

Allie • Ttc #2 and step mom of 3 hoping for my rainbow baby after mc in June and March
Hi. I am 10 dpo and have at least one vvvvf positive but starting to think it was a false positive. What does low firm closed cervix mean? I haven't really been one to check my cervix but around the time of AF, if I check around the time I feel she may be coming, I can usually tell by pinkish discharge or the beginning of AF. But can someone explain what a low firm closed cervix could mean?