Hi MrPopples, praise God for your honesty. It's the first step in changing...admitting to yourself that there is a problem. I'm no expert on rehab, but maybe I can offer something.
Ok...let's step this out.
1. Have you prayed & asked God for forgiveness? If not, stop right now & do that. If you aren't a Christian, let God speak to your heart & accept His salvation.
2. Give yourself a huge pat on the back for making it to day 5. Hallelujah!! Never forget to thank God for each day you are clean. It is ultimately Him anyway, whether or not you are in rehab.
3. Learn how to praise God. Each time a craving hits you, give praise to God for keeping you safe during this time of usage & praise Him for bringing you out of it. Keep praise music going in your home & wherever you can. satan will try to whisper things to you to bring you back to his world, but he can't stay where praises are genuinely offered to God.
4. Read your Bible daily and as often throughout the day as you can. Start with claiming Jeremiah 29:11.
5. Ok, now look at your diet. Chances are, it wasn't the most healthy thing. Make some changes to eat healthier. Don't do something drastic all at once. Too much too soon will probably deter you from staying with it - it does most people. Just be gentle with yourself.
6. Water, water, water. Drink it & lots of it. At least 8 glasses a day, more if you drink colas or coffee. You need to flush toxins from your body to lessen the cravings. Water is the only way to do that effectively.
7. Exercise. Again, nothing drastic right now. But enough to get the blood pumping. That will also help flush the toxins from your system.
8. Don't forget to reward yourself for goals. Once you are clean for a certain number of days, do something for yourself & your wife. A movie, a dinner date, etc. It's about her too. You are giving her back a healthy, loving husband.
I hope this helps...I'll be praying for you & have already prayed.