Me and my fiance'

So it's always been known to me that I wanted to start a family young. It was just a natural thought to me. Me and my fiancé have discussed it before but it's always him and I being on two separate pages. I think we should go ahead and try (also I am getting married in under 5 months, but I don't mind the idea of being pregnant at my wedding ) but he wants to wait until after the wedding. He thinks it's the right thing to do. I want to start trying now. Does anyone else have this same issue with their SO??