I would find out if leaving the room for a few moments is allowed? When I was taking DBT, there were a couple of sessions where I did leave - I left all my stuff on the table, but I couldn't stay there. One, another person was just acting out too much. But another session they were "drumming" on the table, and I couldn't handle the noise. We always had 2 or 3 counselors in the room, so it wasn't a problem, one could easily leave, and it wasn't that disruptive. Aside from that, I guess it means it's an opportunity for you to work on this apart from this class, so the class can be in addition to your own work?