Hugs, Lemon, that sounds like a really difficult session...

And I'd go ahead and see another T during his break--maybe you could find one who you'd even want to stay with longer term? I'm puzzled by the "undermining our work together" thing. I mean, when my T was away a week earlier this year, he offered to give me the name of a backup T if I wanted. I declined, but if he was going to be away for a month, pretty sure I'd have taken her name. Or maybe found one on my own.