Is sex pain normal ?

Pau

I have been married for over a year now and I got pregnant right away. Our baby is 6 months old now but we’ve only had sex like 4 times after the baby was born. Because every time he penetrates it hurts a lot so I find it really hard to want to have sex. I think it’s because his penis is too big but i am not sure if it’s normal that When we have sex is painful at the beginning and specially when he uses condoms.