I feel for you OP, because it's always tough when you and your partner want different things but I'm inclined to agree with others who say that you might need to compromise here.
I disagree with those who have said that your DH hasn't necessarily compromised. Yes, he changed his mind about having kids originally, but who's to say that part of the reason for that isn't that he loved you, so much that you convinced him/he wanted to make you happy.
Two kids (especially at the ages yours are!) are enough to keep anyone busy, and your husband is entitled to want some time to himself/for the two of you as a couple. I think some people here are being a bit harsh on your DH - saying he wants 'his wife' back might be possessive, or it might just be his way of saying he'd like to spend more time with you.
As for the no sex when pregnant - okay, it's not ideal, but who here would judge a woman for saying she couldn't bear the thought of sex when pregnant? Men have sexual issues too, and who know what his anxieties are about sex during pregnancy? (I'm speaking here as a very tough feminist, in case anyone thinks I'm pandering to male crapness!)
The desire for a third child having already had two is not the same as wanting one, having not had any. Children are not consumer goods - you don't always get to pick the exact number and type you want. Sounds like you have a very happy family, so if I were you, I would try to enjoy it (and enjoy the better sleep you'll have in the next few years without a third baby!)