Thank you for your answers.

I went back. And was careful not to open up too much, also because she was going back on vacation right after (like... now).

After the session she sent an email (which is a very rare thing, maybe even the first time), saying that maybe this back and forth of her appearing and disappearing was difficult for me (no way, how did she guess that... ) and she offered a check-in mail next week. And it felt okay, like she was back, and I felt better.
But now actually she is gone again. Sorry, I am confused.

I will write a better answer a bit later.