Sex felt different for him

Kristine • After 6 years ttc, we are finally pregnant. I have an 8 year old son and have been married for almost 10 years.
So, my hubby and I had sex for the first time since I became pregnant. He said it felt different, inside. The way he explained it is that my cervix is way low and it felt smaller inside. 
I'm not concerned, just curious if anyone else has had this happen as well.