GMU that dress is going to be beautiful on you!
I had the same thing happen when I tried on my dress... the sample they had in the store was 4 sizes too big and they just sort of had to hold it on me. I've got my very own proper sized one in now, but the day I went to try it on, my camera died!
Soon I should have some pictures of it properly, but here's what I've got for now....
I hope this works...