Take the time to count your calories you sre consuming currently.
Now think back to what you were eating while you were drinking. Then add in the colories you were consuming with alcohol.
Compare the two numbers. For most people the maintaining colories intake id about 2000 calories. How do your two numbers compare to the 2000 mark?
Personally i usually drank about 900 calories a day in alcohol. Add that to my diet which was at times less than stellar. I stopped drinking and I lost about 8 lbs in two weeks.