I'm so sorry you had to go through the pain of your long-term therapist suddenly making a unilateral termination decision, that must have been very hurtful. So it's to your credit that you are still trying to find another source of MH support after everything you've been through.

I don't know too much about the system in the US as it's very different from here in the UK, but I would say there should not be any pressure to begin working with someone. Do you have the option to try this potential new T out for a few sessions to get a feel of whether you can work with her or not? If you do, it would be worth making that appointment and rather than launching into all the stuff that took you into therapy in the first place, maybe begin by explaining a bit about your last therapy relationship, how abandoned and hurt it has made you feel, with huge trust issues.

A good therapist should be willing to work through this with you for however long it takes, before getting into the really difficult issues.

Good luck with your search.