Advice, please!

I am 21, my husband is 24. We've been together 4 years & married 1. Our sex life is pretty boring... We didn't have many partners before each other. He was addicted to porn for a very long time, but about a year ago got help & hasn't been since. We still only have sex once a week, if that. I am also 38 weeks pregnant but it hasn't affected him before that. He loves this belly! I just don't know why his sex drive is so low. I want to have sex daily! I know he's tired from work & I understand that completely but I still feel he should put some effort.. I don't know what to do anymore, there is no oral. I love oral, he isn't a big fan of it. He's such a perfect husband in every aspect, other than the bedroom. It's really starting to hurt me.