I'd say give her a bit more time (and give yourself a bit more time). The crazy look in her eyes could be a gut feeling you should trust, but it could also just be you being nervous about seeing a new T. As for the confidentiality agreement, I don't know if it's unusual, but her being open to writing one up for you is a good sign. And the phone thing, I would just ask her to unplug it next time. If she seems resistant to that I would feel a little suspicious.