The anxiety from alcohol withdrawal can last for months. It's different for everyone. It depends on how long and how much you were drinking. I was drinking beer about 4-5 days a week for 20 years. I'm on day 43 and the anxiety is pretty bad. It's better than it was though. I expect this to take a few more months until I start to feel even better. Everyone says that it WILL get better. It's just a matter of time and staying away from alcohol for good.