Hello VacantGazer Your wedding, becoming one with another, and also symbolically the unification of aspects of self.
"Things gone wrong" wedding dreams are common when there is an actual wedding on the horizon, and often fairly literal. In your dream the wedding theme is a bit more symbolic.
Do you feel ill-prepared, un-"suited", or otherwise "un-fit" (dress does not properly fit) for marriage or a serious relationship?
Legs often symbolize stability, mobility, and hint at the way in which we move through the world under our own power. For you, they also symbolize self-consciousness, and self-confidence, or a lack thereof. What does this say about delaying your wedding in the dream? In real life? What issues do you have about yourself that may cause you to, perhaps unconsciously, delay or postpone relationship energies and/or rectification of opposing aspects of self? (reschedule marriage ceremony)
Do you feel as if life is passing you by? (car drives past) Do you feel as if others are "getting there" before you? Are your insecurities impeding your progress? (legs/short dress)