This sounds a bit like a mind game to me ...

It's a delicate issue for Ts when clients just disappear. I agree they should attempt some contact once or twice, but ultimately being in therapy is a very delicate and intimate thing, so if you as the client stop going, an ethical therapist won't send a lot of messages asking you to come back either.

My guess (without knowing your T) is that this has little to nothing to do with her being busy. If you want to keep working with her, book an appointment when you feel ready. Then you can ask her how come she didn't contact you, what her reasoning was (if she had any), and explore your need for her to initiate contact.

Wish you the best.