I can relate totally to your shopping obsession. I have it too. I love to shop online and buy model horses. I have a single horse that cost four times my mortgage. Sometimes it really gets crazy but I crave it. Once I spent my entire month's income in a weekend buying several horses.
It sounds like you have a serious problem. Keep talking with the therapist.
My reality call was when they threatened to foreclose on my house and farm because I was six months behind on mortgage. I wasn't paying my bills, just shopping.
If you are feeling that strong urge for the next goodie that you have to have feel free to PM me.
I wish you the best of luck.