At the core of her statement is care and concern for you, which might be a good thing to try to hold onto. That said, she could very well be wrong. Sometimes my T isn't able to immediately recognize the ways I have grown and she worries I'll react strongly to something when I have developed the ability to hear certain things with more equanimity. When she makes false assumptions like that, I tell her how I feel and she usually has the good sense to listen and incorporate that going forward. I think this is likely how things will go when you get the chance to talk about it in session. You can work through it with her.

I would also encourage you to think about how you're doing and maybe slow down a little if this current bit of therapy work is stressing you out a lot or putting a strain on how you feel about L and the therapeutic relationship. You can go whatever pace you need to in order to stay stable and connected. That regulation (or even asking L to help with that regulation) can be part of good self care.