Well - Take heart. If there's just three of you, she actually doesn't do things like process pre-negotiated raises and healthcare enrollment very often - so she's probably not even thinking about it.
If you feel like you have to wait for the right moment, do so - but I wouldn't let it go too long, it is after all, literally just business.
It's tough to get a negative on your review. Years ago I worked at a hospital for a woman who sounds much like your boss and in my first review she actually told me I needed to eat my lunch in the cafeteria and socialize more. Good gravy, did I get steamed about that one. And to this day I can't remember all the other glowing things on that review - just that one unprofessional dig.
