I would talk to your T as well. I've been going through trauma related therapy for the last couple of years, but the one thing my T always says is that 'exposure' or 'flooding' can be really quite harmful precisely because it exposes you to all those emotions of huge anxiety and fear. I'm not an expert by any means and I only really know what I've been taught through my own experiences, but I would definitely talk to your T, explain how you're feeling, and ask if you can either have a break or ask her to really talk you through how this is going to help you, and if so what you can do in the meantime to cope with the anxiety it's bringing you.

Are you allowed to use ANY coping techniques?? Like grounding/mindfulness - anything that will allow you to have a breathing space to calm yourself and get back to the present moment? That's the one tool that helps me enormously when I feel overwhelmed and 'overloaded'.