I'm just about at 4 weeks and this past week was the first time I had difficulty getting to sleep - the first 2 weeks I was having a hard time keeping my eyes open.
As for the wedding if you're that sure you're going to drink and you don't want to take something that won't let you (like Antabuse) then I wouldn't go. But I really don't want to go back to drinking. I'm so scared of people's posts that once you stop for a bit if you go back you go back drinking more and it's harder to quit. It's been hard enough this time.
Good luck and I hear the sleeping patterns go back to normal and maybe you'll get really "sick" and not be able to attend the wedding. Horrible flus going around you know