I just wanted to say how very sorry I am this happened to you.
People who have not been in therapy might not understand what a blow this is.
I hope you will call one of the other providers and talk about all the feelings you have expressed here which are totally understandable. You have had to overcome difficulties in life and I am sorry that this one has come now, in this way. But a lot of the work of therapy comes not from the therapist but from you. If you were ready to start trying to explore your issues, I hope you will keep going despite this truly unfortunate setback. Even something as bad as this can be used by you to push your process of self exploration forward. I hope you make an appointment with another provider ASAP and make this your first agenda item.