That's a real shame Kids...; and are you sure you'd not be better waiting perhaps until after Christmas?
You don't have a signature, so I don't remember your stats (weight, height, highest ever weight, how much you lost etc.). If you lost a lot of weight, you really need to give your EYES and BRAIN time to catch up with the new you before you can accept yourself and SEE YOURSELF as you are now, and as others see you. Distorted body image is a very typical problem with newly slim people, particularly because, when overweight, we tend to focus on our makeup and hair and not LOOK at ourselves.
Up to you of course - yes you'd need 3PPs to start off again...
For the cigs, "just say NOPE" (Not One Puff Ever). Each time you just have one, you're refamiliarising yourself with the substance... Addicts can never go there again... (alas! sniffle!).
Righteo re Champix - have heard of it.