I've been a wedding photographer for 5 years. I've photographed young couples, old couples, straight couples, gay couples, Christian couples, Jewish couples, affluent couples, budget couples, and yet one thing remains the same. People are most beautiful when they laugh.
Do me a favor. Do yourself a favor. Have the time of your life on your wedding day. Forget about all of the money you spent, all of the people watching you as you walk down the aisle, forget about any family drama, and focus on why you're really there. You're head over heels in love with another person and you get to spend the rest of your life with them. Celebrate that, feel that. And laugh.