Married before or after baby is born?

I was supposed to be married September 11th 2010. We already put a deposit of $500 down on our location. I really love the place and its a great deal for how beautiful the place is. The catch is we found out we're pregnant and I will be due in December. I don't really want to be huge at our wedding plus I just bought my dress and it probably won't fit in September. I really think that we should be married before the baby is born. Now if I can only talk my fiance into it. I suggested us getting married at the courthouse and still doing our big wedding next October. He is not down with that he thinks its pointless to get married twice....HMMMM What do you think we should do, Is it really a big deal or am I just making a big deal out of nothing? I'd appreciate your opinions!!