Originally Posted by
Amnesiac 
my sister's wedding is in two days and I've been dreading it for some time,
The two questions that come to my mind are: (1) why are you dreading your sister's wedding? (2) what are the triggers related to this function that have you so ready to give up more than two months of sobriety?
Sounds to me like you may have some unresolved hurt or anger with your family -- or maybe this is a role that you're expected to play.
Think about those things before blindly flying into "drunk brother" mode.