There are many reasons your T may have not been able to get back to you per your request. I know, through my own struggles, it's difficult not to jump on the thought "OK, they must hate me". I'm sure something has occurred that gives her reason to have not yet responded.

I talk my abandonment issues out with my therapist as I can. It's a very hard thing for me to address, especially because the issue is occurring with HER and to have to sit face to face with her and talk about it is nerve-wrecking but necessary.