It sounds like you have a valid fear that she's being irresponsible toward you, and that her decision reflects a lack of caring, and I agree.

When we discussed this initially, I said that she needed to put her own fears aside as her first priority is to her clients. Not doing so is contrary to her profession's ethics and your needs. It's a breach of duty.

That would fester for me too.

I wonder if you could send her an email. I hate paying to discuss my therapist's mistakes!

P.S. Also, don't fret if you said 'yes' in the moment but want to say 'no.' It may be resistance, but I don't think it's wise to act based on guilt. You have every right to cancel after the fact if you decide that's what is best for you. I'm not saying you should or shouldn't, but I hope you don't feel you've failed for setting an appointment you don't want, because you were feeling pressured- you can always change your mind.