Permanent liver damage?

For a couple months (a little less than half a year, I’m not sure) I drank hard liquor every night just to relax and get me to sleep. Sometimes getting absolutely shitfaced but most times not. I realized it was becoming a problem so I quit for 2 months, now I drink occasionally on weekends but every time I do (even if it’s a beer or 2) I wake up with awful lower stomach (I assume liver) pains and heavy legs which don’t go away for the rest of the day. Does anyone know anything about this? (I always drink on a full stomach now when I do drink)