I know lots of people at my meeting don't believe in God as Christians would believe in him. They have found a higher power of their own.
If you haven't already done son, it might be worth checking out some of the posts & responses on the secular 12-steps section...
Secular 12 Step Recovery - SoberRecovery : Alcoholism Drug Addiction Help and Information
Also you could maybe re-read the Big Book Chapter 4 (We Agnostics)?
http://www.aa.org/assets/en_US/en_bigbook_chapt4.pdf
I hope things get better for you soon.
