Kids before or after marriage?

My fiancée doesn’t want children until after we are married. I have wanted a child forever and now that we are engaged the feeling I have is SO much stronger. He still doesn’t want to. We won’t be getting married for about 2 years. What can I do to help my crazy brain? It won’t shut off. I look at a picture of a baby, or baby clothes or baby anything and the desire to have something/someone so magical makes me want to cry. Help. Tips, please. Have anyone experienced this?