tammy...IIRC, you ordered your dress from David's Bridal, right?
When mine came in, I asked to try it on, just to make sure it was the proper size and also to see it out of the bag to make sure there were no marks, snags, missing beadwork (not on mine, but a suggestion), etc. Once you sign that that dress has been picked up, you can not hold the bridal shop responsible for any damage to the dress, even if it WAS their fault and you didn't notice til you got home.
So take your shoes if you have them, and your undergarments, try it on, do a little happy dance in front of the mirrors, and maybe try on some headpieces/accessories if you haven't picked those out yet, since you'll be able to see how they go with the dress!