Is sex still ok? 😬

Ok, so this is super embarrassing which is why I'm posting anonymously 🙈 but I am currently 31 weeks pregnant with my first. My sex life has become almost non existant over the last few months. I think it kind of weirds my husband out and I think he worries about the baby a lot. Anyway, it had been a few weeks since the deed was done and last night we decided to go for it. Only a few thrusts in he asked if everything was "ok down there". I told him everything was fine so we kept going. It didnt last too long, as I said it had been a few weeks lol. But when we were finished he told me that things felt super tight and maybe even swollen down there. He said he felt like he kept hitting something and like he was cramming into something that he didnt fit in and was worried that it was the baby. As for me, it hurt. It almost felt as if I was losing my virginity all over again. I know he wasnt hitting the baby or anything, but is this something I need to mention to my dr or is this fairly normal?