Wedding dress stress

Caitlin • Here we go with baby #3!
Okay, I'm getting married June 1st and I went to try on wedding dresses last night and had a minor panic attack. I'm 24 weeks and 5 days currently, so I'll be just about 7 months when I get married. So, I have a few questions for those who know wedding dresses:
1.) what type of style should I be looking for?
2.) what companies offer wedding dresses or a white dress that doesn't cost a fortune? (I tried David's Bridal and after alterations they are above my price range).
3.) is it horrible I don't really want traditional because I'm thinking more practical? My fiancé will be wearing a navy suit, so I was thinking a dress with navy tones that I could wear again. Saw one on Tiffany rose I liked :) 
I'm getting married before baby is born, because that was the original plan anyways. We are having a small ceremony/reception in my parents backyard with 50 people tops. Just some background, and it's an afternoon wedding.
Thank you for your help!