I understand that you're upset, if you're definitely wanting more babies, however, maybe I can make you understand his side a little to make your feelings towards him become a little more accepting.
In many marriages I am personally friends with the wife in, the wife wants multiple children. It seems to me like once a woman becomes a mother, a lot of them "need" to be a mother. I truly think it's because many women are unfulfilled in their lives outside of motherhood and being a mother gives them a definitive purpose and makes them feel very needed and important. The women I know that want lots of children and their husbands don't definitely take on this role. Now, the husbands look at things logically, they look at finances, retiring, and having time with their wives to enjoy while they're still at an age where they can do so. Men are logical when it comes to having children, women are emotional. My husband is lucky, I looked at motherhood as being logical, and out of all my girlfriends and women family members, I only know of one other girl who does the same. I look at it like this, my husband and I have two children. I think two children is great for many reasons...First, they have a sibling to play with and be close to. Second, two isn't to the point where we won't be able to fully fund their college educations. I could go on and on, but it's pretty self explanatory. But I will say that when our youngest is 20, my husband will be 50, and I'll be 47, so we'll be young enough that we'll be able to travel and anything else we may find interesting. Don't get me wrong, I LOVE being a mother. I stay at home with my kids and LOVE it. But I also look forward to down the road when I'll still be young and the kids are out on their own starting their own lives while me and their father travel the world and enjoy our retirement. My mother was a woman who couldn't stand the thought of being alone once her 3 kids were out of the house, so she decided when I was a freshman in high school, to have another child. Then, she had another one a year after I graduated! Now, she's 53, and although she loves her kids, she really regrets not thinking about these particular years when she made the decision to have kids later in life. She'll even admit to you that she didn't like the idea of being alone with no kids in the house. She's defined by being a mother, which is really sad because now, by the time she has no kids in the house, she's going to be 60, and not be able to enjoy herself because it's been very expensive to raise 5 children. My stepdad and her have no savings, only 401K's. They have two car payments and a house payment. Having kids their whole lives has been really expensive! So, I'll stop rambling now, but just think about ALL aspects of your life, not your life in motherhood, but YOU'RE life, as R., before you decide that him not wanting anymore children is such a selfish idea.