No way are you overreacting! I'd be feeling the same way. If this happens again put her in her place. Of course she's your boss and you'll have to be careful about what you say to her, but she has no right to treat you that way. I'm sorry this happened to you and if you feel like you need to switch jobs do so. Only I would suggest you find a new job before you quit the other one.
I wish you the best of luck