Now I know why I got so messed up!

Because I was PMSing! Yes, it is a verb.  I always, always get sick if drink right before I get my period.  I didn't get sick because I'm a lightweight (4 martinis and a bottle of wine), but because my period makes extremely sickly.  And it explains the back pain.  But I'm still calling it quits,  so my offer for free hooch is still good.