Anxiety can be a symptom of post acute withdrawal syndrome. You've been sober for less than 40 days. I think many alcoholics experience it.
It's possible that it could go away on its own, with time away from the booze.
If you do decide to seek medical assistance, I've found that working with healthcare professionals with experience in dealing with addiction to be the most helpful. It's also important for me to be frank about my usage history and past addicitions when discussing treatment options with doctors/therapists.