Alcoholism Recovery & Treatment

I suffer from ADHD and have my whole life. I have always preferred to manage the symptoms on my own through diet excercise and structure. Recently I have become very overwhelmed by the symptoms… I have been through counseling, completely removed sugar and alcohol from my diet. I have tried planners, sticky notes, journals, meditation, yoga, everything. I need help! I went to the doctor yesterday to see if I could get a prescription until I can get myself back on my feet. The doctor said I needed to come back and undergo a blood test and urinalysis. Is this a normal procedure and why?