husband doesn't want sex??

So my husband and I normally have a very healthy sexual relationship. We've been together 6 years and I'm currently 39+5 with our first child- a boy :) since I got pregnant we've had to lay off of sex because I am very small framed and our boy is measuring very big, so it's hard for me to have sex physically and be able to enjoy it. I have always give my husband the kind of attention and sexual pleasure he's needed whether it be a BJ or a handjob. Well lately I have been telling him I feel like I need sex and intimacy because we aren't going to be able to have mutual sex for 6 weeks after bub makes his appearance. So I text him yesterday while he was a at work and said if I can do it, I want to have sex tonight, I feel like we need this. He replied with "really? lol okay!" So I'm thinking yeah! We're gonna get it on tonight one last time, I shaved did the whole 9 yards, got into bed and he says "you know what would speed up your labor, a blowjob!" Of course we both knew he was just being dumb and that would do NOTHING I help with speeding up labor but I wanted to see if he would realize that I wanted sex, not just him to get his rocks off! I was like well what about me?! And he was like what do you want?? So at this point I'm beyond irritated and just ready to go to bed. So I gave him one and we went to sleep...just to shut him up. It makes me feel like he chose to get a blowjob, instead of having sex with me. Any advice on what I should say to him??