I think you'll definitely find a few retailers that deliver their products in a few days or a week.....look for gorgeous dresses for future mommies that look like pretty bridal dresses....

Asos has a selection of amazing maternity dresses check out these examples...

First of all, I would definitely go to a store not buy online. You need a fitting that takes your pregnancy into account. Second, don't wait--go tomorrow because alterations take time. If you know a few stores just pick one and go with one or two friends and maybe your mom (definitely NOT your fiancee!!). If you don't know of any, check out google or yelp or something to find a few good ones.

I agree with having one custom made. Hotinshop is a very reputable. They are personable, and come highly recommended. Good Luck in your search.

hey, i think u might need an empire waist dress? for ethereal look, and most important u wont hurt yr baby with fitted bodice, right? just my thoughts. attached chic nostalgia gowns for your reference. b happy~

An empire waist dress will be perfect. Remember that the most important consideration that you have to bear in mind is having your skin well taken care of. You may check out http://www.clearclinic.com/ to look amazingly pretty on your wedding day.