it happened noooo

I've read about other people's therapist's leaving, even dying. But I never thought it would happen to me. She opened the session saying she got a new job, and there was no way I could come with her. I started BAWLING. I have to start all over, she was a mother figure to me. Im so sad. What do I do? Im 15f, with social anxiety, she's one of the few people I've ever opened up to.