1st fitting disaster! (long)

I'm totally freaked out! I went for my 1st fitting today with my shoes, my bra, stockings, slip, veil
camera & everything. My dress was supposed to be in 4 weeks ago so I'm really dying to see it!
The bridal salon girl puts the dress on me, starts to zip it & the zipper isn't working. She leaves me standing there with no explaination to get the manager. The manager comes in & says 'do you want a whole new dress or just the zipper?' I'm totally confused because I can't see the zipper & I have no idea what happened. before I even have a chance to respond she says 'no, its Eve of Milady-I'll never be able to get a new dress in time we'll just get a new zipper'
My zipper started opening after it was zipped & can't be fixed! So now I paid a small fortune for a brand new designer dress & it needs a replacement zipper!!!!!!!!!!!!!!!!!!
I might have freaked a little, she says that she'll have the new zipper Tuesday morning & I can come Tuesday @ 2 for my first fitting. They basically pulled the dress right off me, I don't even know if it looked good. I'm so disapointed!!!!
I'm not even sure if I want that dress now-is it a bad omen? I'm flipping!