I'm really sorry you're struggling right now. I think it's great that your T recognises the need, and reason, for you to potentially contact him.

You ask what he could do anyway. Well, maybe it would help just to have some kind of tangible reminder that he's there for you, and he's coming back. If you speak to him briefly, it could help sustain you and would send a message to your unconscious mind that you don't have to deal with everything on your own.

I think you're seeing things in rather black and white terms: you say you're not going to try to sui, so you shouldn't need your T. I say there's a grey area in the middle where you feel desperately bad and need to talk to him. I think you would absolutely be justified in calling him, and I think you should go ahead and do so. Just hearing his voice could help.

Other suggestions for how to cope the rest of the time: I wonder if counting down the days somehow could help, e.g. crossing them off on a calendar? That way you can see them going down and your next appointment getting closer.

Also, does journalling help you at all? Personally, I find distraction is ultimately what gets me through breaks from T - I read a lot of free book samples on my Kindle and play a lot of Sudoku.