Remember: Babies don't stay babies forever. I think sometimes women see the "romantic" ideal of pregnancy, childbirth, and babies, and they ignore/avoid/discount the fact that they are a lifetime commitment and it isn't all sweet baby clothes and cuddling. Children are HARD work. They are hugely expensive, not just as babies; in fact, they get more and more expensive as they grow.

Figure out your relationship issues. Get married and stay that way without children for a few years. Then have children. You are very young still and have many years to get this all figured out. There is no rush here.