[Kate*]

If this keeps happening, I'd start looking for another one, or see if it's the receptionists. I almost fired my therapist because of the same thing, and it turns out the reception was the issue. She kept cancelling or cutting me short with no notice because they never communicated it to me, someone else showed up at my time because they wrote down the wrong day (scheduled me, but gave her the wrong date), She only saw me because her next slot was available, otherwise I would've been cancelled on (somewhat willingly as the other client was in crisis, but still not okay) she cancelled for a medical procedure and asked them to call me and they didn't, so I checked in early, only to wait until 20 minutes past my appointment for them to tell me she WASN'T in the BUILDING. That's when I lost it, and she laid into them. I haven't had a problem since.

If the doctor is the problem, you can find another one, if the reception is the issue, then I'd rule out any doctor in that practice or you'll have the same problem. Professionals work for us, you don't have to put up with this.