Hi there myLazyitis (ha! funny name) So...someone here on this forum will probably know the body better than I (I'm learning though), so I can't help you out with what organ is acting up when you drink alcohol. (because the liver is up higher than you're suggesting) BUT, it's probably pretty clear that you did do your liver some damage. I would suggest taking milk thistle and dandelion tincture right away to start repairing your liver. You can buy it at your local health store. Do a month intensive...several drops per day to really get it going. Your heath store helper will be able to tell you how many drops per day.
Hope that helps! Did you notice if the pain was more acute with hard liquor...or? Better repair first, then see if you can handle moderate alcohol use afterwards.