CE- i understand about the miffment. Perhaps there are less drastic scenarios available to you - such as she is going on an extended vacation and wants to schedule her regular clients at her return and does not yet have that all straightened out.
I would write back that I hoped all was well, I would look forward to hearing from her in a couple of months, and that if something happened to her to prevent another meeting, I would be miffed (if that was how I felt).