This teetotal month, how did you make up the 600 daily calorie shortfall from cutting out the booze?
Which medications were you taking during this month, and how did the amount you were taking compare to the month before and the month after?
Did you notice any difference in how you felt over the course of this month, especially towards the end of it? Any difference in the frequency and severity of your headaches and stomach pains?
What prompted you to resume drinking alcohol?