Silent,
Can you discuss this with T? Is your individual T the moderator of the group as well? I think you need to discuss your reaction with either your T or the group facilitator or both.
T and I have discussed group therapy and together we decided I am not ready yet for group talk therapy. He doesn't want me to get over stimulated. I know that if that happened and I was in the group I wouldn't be able to handle it at all--not only in the moment, but it would continue to bother me afterward.
Good luck Silent. And place a phone call to T!