I'm really sorry to hear this. Usually I'm all for being very open about things, including diagnoses. I don't think depression or bi-polar or an anxiety disorder, or whatever, is anything to be ashamed about. So when I hear about employers using a diagnosis of MI against people, it really makes my blood boil. It's so wrong!!! By the sounds of it this annoying colleague of yours has some emotional issues of her own if she already has three formal complaints lodged against her. I'm so sorry you got stigmatized like this. And I really hope you feel better soon