Sex 34 weeks

Ha

This may be a bit TMI or just a weird question in general but I’m 34+2 and last night my SO and I were DTD and it actually hurt. He said he felt like he couldn’t “put it in all the way” and like he was hitting something. Anyone else have this problem this far along? It didn’t hurt him, just made him uncomfortable, but it did cause me some pain and ruined the moment. Maybe it’s just my cervix getting lower? Not really sure but I’m so confused because we have sex all the time and have never had this problem!