Okay so I'm 37 going on 38 weeks in two days, my boyfriend and I had intercourse two days ago and he…

Okay so I'm 37 going on 38 weeks in two days, my boyfriend and I had intercourse two days ago and he struggled to go inside... he said it was too tight. This just started happening we never had this problem in the beginning 🤔 any idea what this could mean? lol it's my first time being pregnant I have lots of questions 🤦🏽‍♀️😂