Hold on Fish, it is about to get a lot worse but it will definately get better. For the first 3 days there is still nicotine in your system and it will be screaming for more. That will let up.....only to return from time to time.
Keep yourself busy, read all you can and get pissed at the assholes that got you addicted to this shit so they can get rich off of your death. Gum, candy,seeds, fake dip. use whatever you can to stay off of nictotine. Shout out here for help if needed.
Make the promise to yourself each and everyday to stay clean, and you can do it.