That's a long time to go between sessions.

I don't think there was anything sinister in your T's assistant calling back right after you talked to T. It might even have been related. Your T could have hung up the phone after talking to you and then slapped his head with his palm, "I wonder if office assistant has told lauren helene that I won't be here next week?" Then he calls out to office assistant, "hey, don't forget to call lauren and tell her about next week--I just spoke to her." And voila, then office assistant calls you. Nothing bad, nothing punishing, just your T and his assistant taking care of therapy logistics.

Come here and post in your T's absence, to while away the time. Hope it passes swiftly.