((((canders)))) what a tough situation. Others here have had to do this, and I'm sure they will have good advice for you.

Is there some way that you can meet with both your current T and the future T a few times together? If not, you should begin the transistion asap...so that your current T is available to the new one and share info so you don't have to go back through/over so much "stuff."

Is this a new situation? Did your T not make you aware that this would be happening??? I mean, she knew she was "in-training." Is she going into private practice? Is she not allowed (through contract) to "take" you with her? Sorry, I seem to have more questions than answers for you...

Hang in there...and YES I think you definitely need to do this. Ask your T for help in transferring.