Welcome, and good job quitting, and reaching out for help!
You can do this, and you have the right approach- get through instant by instant if need be. It is a tough battle, and it it worth it to get through. It does get better, sometimes a little every day, sometimes more.
One thing you will need to consider- are you quitting for you, or for your wife? Sorry to say it, but quitting for someone else won't carry you through it. When things are bad, you will resent them instead of dig in. Sure, your family will benefit, but it has to be for you to work. I know because I tried to quit for others countless times before, as have others here, and it doesn't ever work that way. This is your addiction, and your battle.
You will need to start posting roll with your April class. To start out, go the the WELCOME CENTER- a salmon colored link above and learn the basics. Other than that, keep slugging it out. Read all you can here on the site- the better you know your enemy the less scary the quit is. And make friends- the quitters here are amazing, and bad-ass. They will carry you if you need it - you just have to hold up your end of the deal.