Welcome Dan! 52 days ago, I was where you are. I wanted to add to all the good advice in here by telling you to READ, READ, READ this site. Read the links, read the introductions, go back to a group quit page from three years ago and read. What you'll find are a ton of people very much like you who are or have been going through the same things you are going through. That alone got my through the tough times early on.
Once you get your first few days under your belt, post roll as a supporter in another group or in the next month's quit. Giving back and helping newbies makes your quit stronger and is the currency you use to pay for your time here.
Head's up....weekends suck at first...lots of free time and lots of triggers. Realize it, plan for it, share what you're feeling with your wife so she can see how she can help you, and EMBRACE THE SUCK till you don't have to anymore.
You have too much to live for to kill yourself slowly with the nic bitch. Give the nic bitch my favorite wave... 'Finger'