Pregnancy Sex (TMI)

Cassie
So I'm 25w and whenever my hubs and I have sex, I am uncomfortable almost the entire time. 
Firstly I stay swollen and the outside of my vag always feels raw. And when he's inside it feels like it's on fire cuz I'm already swollen and the stretching burns. 
Does anyone know any way to help with this? We use lube and he goes slow. What else can I do?
With my daughter, I didn't have sex cuz her dad and I broke up after I found out I was pregnant. So idk what to do.