I would be worried and upset by this too. It brings up all sorts of painful feelings when T doesn't respond to contact.

I also feel that you would benefit from discussing this with T at the next session. I did this myself recently and it was extremely difficult, but paid off as now I'm more clear where I stand. Even if your T states that he won't reply to all emails and calls at least you will know.

I always worry about a T's personal safety as well as feeling rejected so just knowing that T might not get back to you and that doesn't mean anything is wrong could be helpful.