A banana is great. Whatever you can hold down will help. You mentioned there is an AA meeting on Friday. You could call AA and have someone meet you there.
It helps so much to have supportive people around when you are trying to quit alcohol. I used AA the first year and also began therapy. The anxiety you are experiencing now is heightened by alcohol withdrawal. Your problems seem magnified right now but there really is a simpl,e solution. Just don't drink today.