I really hope Noodle is just coming here bitching his heart out as a way to vent an anger he doesn't feel is entirely justified.
If you really feel this was
Noodleface
I would suggest thinking seriously about what you've asked her to put her body through. Yes, its something she wanted. Yes, its something she agreed to do. But its taxing, its hard, and maybe you've left the early bitchiness build inside of your head to something it shouldn't be, and now your resentment toward it is simply magnifying the situation.
Try buying her a nice maternity dress (you should goddamn well know her size, and DON'T fucking take her shopping. She will feel like a cow in anything), shower her with affectionate comments when she puts in on. "I didn't know pregnant could be so sexy." type shit.
Then ask her what her craving is that night. You take her to the best place for that type of food you know. You flaunt her around like she is the 20 year old hard body midlife crisis that so many guys are envious of. You make it VERY obvious to everyone that she is yours by your actions. Not aggressive towards others, but in that "I can't believe I landed this one" kind of way. Make her feel like she IS that 20 year old hard body midlife crisis.
You don't go for sex, you don't try to play any kind of sexy time. If sex needs to be addressed? You make a comment like "just wait until you're able again, Babe. I've been dreaming about it."
I fucking George Zimmer guarantee that shit improves.