if your T thinks you are DID then she must understand that alters may behave differently than you... has she talked to any of them? i think talking to her directly would be good, and if she has experience with DID then let her decide. You could send her an email now to warn her of possible emails from the alter. It really needs to be something you decide with your T. She may decide it's too soon to deal directly with an alter (too soon for you) or she may decide that it would be productive for her to learn from the alter.