Tight cervix and trouble conceiving

Autumn
Hi ladies. I was just curious if any of you have been told that your cervix is abnormally tight and have trouble conceiving? My last doctor commented on my cervix multiple times but never mentioned anything about having trouble with that specifically. He was more focused on my endo and how that would stop us. But i have stopped going to that doctor for multiple reasons. I conceived after my laparoscopic surgery in December but unfortunately had a missed miscarriage. And I also had a chemical in April of the same year. So far have gotten pregnant twice but can't seem to keep them.