AA is always a good option to start at. At least you know you will be being proactive about your situation and getting help in a proven process that so many other people have used.
Anxiety sucks. I have it, and have had it for quite some time now. I am only 32, and should not have had anxiety since I was 18 years old... what does a young person have to be anxious about? I am on wellbutrin for depression which also works some for anxiety. Can you go to your DR and see what they have to say? They could give you something for when you quit and help you with a long term medication plan for your anxiety.