Well, 54 days is awesome, but not very long in the whole scheme of things! Maybe read up on some Post Acute Withdrawal information (there's a sticky here somewhere). Also, have you seen a doctor? Sometimes when we quit drinking, we come to realize we might have other problems, medically, that need to be looked at.. not everything is fixed when we take away alcohol
What else do you have going on in your life? Good relationships, satisfying work/other activities, hobbies, etc?
Becoming abstinent from alcohol had nothing to do really with me feeling that much better, it was once I changed my entire life and started really living that I started thriving.