Fog... it will pass. It might stick around for a while. Here is what is really interesting... the fog is a reaction from an increase in oxygen levels in your blood. Nicotine suppresses oxygen levels, so it is like your brain has been running on a clogged oxygen artery. Now it is getting a full run of oxygen, and that big brain is now confused because it is getting what it deserves.
Craves... interesting. You know, in time, you will almost start to appreciate them. They make me laugh now. Because they remind me of how I am beating something into the ground that I lost at for a hell of a long time. They are reminders that I am winning. They get fewer, farther between, and very very very easy to deal with. Just worry about today.
I promise, this fight is so worth the effort. Yeah, you are gonna have a few days of suck. So what? You are gonna have a lifetime of win. Suck it up - go punch a punching bag or some asshole's face (ok... just kidding on the last part) and stay clear of booze for a while. It lowers your inhibitions and makes it tempting to break your word. You have a kick ass December team to lean on. And a great start to a great quit.