You said you've been to detox - what type of withdrawal symptoms do you get? Have you had the shakes/tremors, hallucinations, etc? Xanax isn't the best for dt's since it has such a short half life. I would recommend taking a half of one when you start because you'll have to redose every four hours based upon your symptoms. I would get the shakes and tremors in my withdrawal, and aside from feeling like death, it was never anything too serious so o would refrain from using benzos to help with the come down.
How long have you been on Xanax and how frequently do you take it? Also, how long have you been drinking, the average quantity, and the frequency at which you drink? Are you wanting to get sober or are you wanting to recover from the bender? No right or wrong answer either way - I won't judge. I was a 17 year hard drinker and a 10 year benzodiazapine person, so I have insights either way, and tow years sober. Alcohol addiction is brutal and so is Xanax, so I can certainly relate to how you are feeling right now. Sorry for all the questions, I can better answer your post having those answers.