I think you are right to be upset. That wasn't a very ethical thing to do. Your T should have at least called or let you know (since asking was apparently out of the question) during the last session you had. That is so wrong. If nothing else, it is an invasion of your privacy. I think, if you can, you should talk to your T. Was that even legal? Doesn't that go against dr/patient confidentiality? If your T doesn't think there was anything wrong with it, maybe you should get a second opinion. This shouldn't have been done without your permission.