I agree With UnaLuna, You were not pacing yourself enough. With any when you want to come of any benzo you need to do it very very slow. You might get impatient but thats the way it needs to be done in order to avoid all the horrible withdrawals. Talk to your doctor and try dropping 0.5 every Month that should get you off the Xanax completely with in 5 months.

Hope everything is going good with you though ?