I sorry you have had so much uncertainty lately about the availability of your T. It is very hard to maintain a secure attachment to someone when stuff keeps changing like that. Not to mention all of the "rules" - I don't mean boundaries in therapy but all of the bureaucratic rules it seems that are making things hard for you.
Is there any way your T can help you transition to a new T before you hit the age limit? Can your T talk to your Dr. and see if something can be worked out so you can still see her?
At least for now, can you call her for some support to get you through to your next session?
This all really sucks and it doesn't sound fair. You can rant and rave and vent here all you like - we will listen and understand and a lot of folks here can certainly empathize!