Welcome to SR. Sleep can be a tricky thing at times. I experience bouts of insomnia.
I no longer try to convince myself I don't need it. The part of me that feels a compulsion to drink is not reasonable - it can't be reasoned with. It's like trying to explain to my dog why she can't have another doggie treat. She doesn't understand my explanation. She only understands "no".
Best of luck on your path to abstinence. You can do this!