Changes can be very unsettling, even when the changes are considered for the best. These changes are stressful for you and also involve a significant loss, your therapist.
Do you feel you can get through the change in therapists without destabilizing?
I think this would have been/would be a great topic for you to discuss with your T, as it's the loss of her you are/will be grieving.
My pdoc is also my therapist and I do not know what I'd do without him right now. I'd be lost. When we do part ways, there will be some major grieving. I'll probably be very frightened of that change when it comes about. It makes me anxious to think of it now.
Many of us are very attached to our therapists. It will take time to adjust. In the meantime, you'll experience lots of feelings.

(((((( HALLIEBETH ))))))
Be gentle with yourself.

WC