While makeup is certianly your best bet given that the wedding is in a few days you could speed up the healing of a black eye by using a warm compress (try putting rice in a sock and microwaving it for a minute or two, make sure its not too hot!).

BLACK EYE To BEAUTIFUL - Cover Up Makeup Tutorial ... While there is no magic cure to get rid of a black eye overnight, here are a number of things that may help speed up the healing process so your eye can look ...Black eyes are relatively common.

Healing Your Black Eye. Using makeup for a black eye is useful, but it can be a hassle to apply. The process can take up to 20 or 30 minutes from start to finish. You’re probably interested in how to heal a black eye quickly so that you can get on with