Maybe it might be a good idea to promise yourself an alotted amount of cash to shop with. It might best serve you to make it a results based reward. At 30 days $200.00. At 3 months another amount. At six months.... etc.
Alcohol, shopping, drugs, etc. They're all compulsive addictions. To beat them all, it takes discipline, patience and the ability to accept adversity as a good thing. If we can allow ourselves to unload the old, the new can be greeted with more enthusiasm.
No matter what you do, you know the one thing you CAN'T do. When your head hits the pillow, if you take sobriety with you, you are awesome inside and out.
Have a great day!!!