I assume that your T has a private office, there is no receptionist, and she wasn't there. If my T's office door was closed but I knew she was there, I would have called her or knocked on the door. Of course if there was a receptionist I would have told him/her.

If my T called me an hour before to say she would see me in an hour I would assume that she was in a traffic accident. That's the way my mind works, unfortunately. I would panic and call her phone, since she always has her cell phone with her. I don't think I'd be angry, just anxious and upset. VERY anxious and worried I think. I would know it wasn't about me, that something happened--an accident or emergency.