Anxiety is very normal during withdrawals, and also after we've done things that we regret ( which we've all done by the way ).
Your body and mind are going through some major changes when you first stop drinking, did you happen to mention that to the doctor when you were there for the testing? Best to be safe during the initial days after quitting.
The solution of course is not only to quit drinking, but to start thinking of what you will do for your recovery. Taking the alcohol out of the equation is only the very beginning - have you considered seeing a counselor, attending meetings or some type of supervised detox/rehab?