I can't offer advice, but my sister is plagued by the same thing (she's not a drinker though). She can't put on a pair of pants or a blouse without worrying what other people might think. She's afraid to smile, thinking people are looking at her teeth (which are fine, by the way). She tortures her self about it. I try to tell her, most people aren't focused you...they are too busy worrying about what you are thinking about them.
Didn't seem to help her. I've suggested therapy. Maybe that would help you.