Anyone struggling or have had issues losing weight before your big day?

I have been really trying to eat smart, continue with my weigth watchers, and excersize. i was struck with shingles that has had me out from work for three weeks now, and has prevented me from doing much of anything too physical. I am getting a bit nervous as my wedding is in Sept this year, is in Florida (as I live in NJ.) I also am expecting my gown to be coming in literally any day and I have yet to buy undergarments, nor shoes. But here is the biggy... I have purchased my Vera Wang two sizes too small. I obviously won't fit in! I'm not sure what to do. Panic is setting in! I realistically need to loose about 20lbs to fit, but truly I neeeed to loose about thirty-forty to get back to my normal weight. Anyone else have any issues?