Days like this are certainly a learning opportunity--but they also suck!

Yeah, it sounds like she misspoke. But the opportunity for you is to experience cutting people some slack. Others don't share our state of mind every second of the day, even Ts in session. Our feeling states don't dictate what others do and say. She owns her language, and you own your feelings about it. Sometimes, when both people are invested in a relationship, it makes a kind of negotiation possible--and I think that's what happened here eventually.

Your reactivity to others puts a lot of stress on your capacity to self-soothe and take care of yourself in a healthy way. That's what emotional regulation is all about, and why she wants you to practice while you're in a protected setting with support. Have you had any experience with mindfulness? Sleeping excessively is avoidance, more than self-care. Mindfulness techniques may be part of your DBT. These techniques take a lot of repetitious practice before they become natural feeling. And practicing them under a certain amount of stress is important. Your T isn't setting limits to punish you, nor because her regard for you has changed. She's doing a good thing by you to help develop your ability to keep yourself safe. The difficult feelings that come up are part of the process.