It's very, very physical. It's not a mental problem, it's a physical problem.
I agree that it can manifest itself with physical symptoms but anxiety is rooted in mental health. I only say this because just like you I drank to hide my anxiety, to escape it. Unfortunately for me, that only worked for so long before the alcohol became a bigger problem. I have been without alcohol for 10 years now and yes I have physical symptoms from the constant anxiety. But I do know that the physical symptoms have not gotten better without mental health help. I encourage you to read about anxiety and see for yourself what the root causes of it can be and how they can be addressed. As they say "knowledge is power"
Can I ask why if you feel this is a physical problem that you posted your question in the mental health forum?