I too, pre-Mirena, was a social drinker (not heavy, just on the weekends or out at dinner) and never had a problem with alcohol. Then post-Mirena, I started to have horrible anxiety, panic attacks and constant worry. I'm 2 weeks post-Mirena removal and am starting to feel a little better, but when I talked to my GP (before and now) he warned me that if I've got an anxiety condition, alcohol will aggravate it. In the beginning, alcohol will have a tendency to act like a valum, but as it wears off, it can act like caffeine or an anxiety provoker.
He said, until my hormones and body is back under control, I may want to lay off of the alcohol (which I have, plus I've avoided caffeine - which is a total bummer, because I was practically paying my local Starbucks' rent every month :))
I'm also on anti-anxiety meds, so it's best that I avoid alcohol for now anyways.