I'm sorry you are upset, but didn't you cancel your last appointment? Not sure how that makes it her fault that she didn't tell you about her vacation.
I know my therapists generally didn't give me lots of notice about vacations, particularly if they were only gone a week. I do hope you will go back and actually talk to her about your disclosure as many of us suggested previously. I think you may be making assumptions about her motives that just aren't really what is going on.