You've gotten really smart advice by others in this thread. I would add only that having once terminated therapy on the flimsiest of excuses, I have asked myself whether THIS (whatever is bothering me) is how I want to end therapy. So my recc to to find you "ordinary courage" (Brene Brown) and make another appointment.

I'm wondering if you feel rejected by your T because she had to cancel? It sounds like she is protecting her privacy, which makes it about her not about you. And since this is otherwise not a repetitive issue for her, I know it must feel disappointing but try to hang onto the fact that it is not a message about your importance or worthiness.