Sleep?

I haven't been to bed yet... its 7.16 am and i have been awake since Friday morning. You'd think i'd be tired. I'm reading lots of comments on forums about excess skin after weight loss. Anyone thats lost a lot of weight can you comment me or email for some feedback? Obviously that doesn't change the way I feel about getting the surgery done however I want to try as hard as I can to prevent having loose skin!