Welcome. You sound like so many of us when we are in the grips of alcoholism.
The anxiety is both caused by and relieved by alcohol, and thus the vicious circle continues and continues to get worse.
Quitting drinking will eventually give you some anxiety relief, but not right away. In the short term my anxiety got worse right after I quit. With time it went away completely, but it took a very long time. Not a day or a week, but months.
Just put down the drink (with medical help, it sounds like you are getting) and one day at a time your body and mind is going to heal. Your story is a very common experience. I hope your physical issues come out okay. The liver is pretty resilient. As with all of this, take one step at a time. Get the blood tests, go to the meetings. Do the next right thing.
You can do it.