My T became unexpectedly sick, I could see him going downhill as his skin became very pale, almost grey, and he seemed to be losing weight quickly. This was a few years ago when I was in the middle of a big grief, he began canceling sessions and then he said he'd be out for 3 months recovering from surgery. At some point pretty late in the game, he said they had thought he had cancer but it turned out not to be.

Sometimes the medical stuff is complicated for T's, in terms of communication. Sometimes what they are suffering with is ambiguous (i.e. doctors don't know what it is or they don't know how to treat it) and so they don't have much to communicate. And then I think they are careful to be honest but also to protect clients from unnecessary TMI and then they have a right to medical privacy as well.

I can understand your distress at what is happening, but I guess I would say from experience that I found I could get back on track once my T was back in the office, and the years I had (and you have with yours?) were able to quickly bring us together for my benefit. I wish that you could feel you don't have to give up because I think you've made a lot of progress, but whatever is right for you is right for you.