Mona,

I used to have an inconsistent T. She always changed appointment times and did cancel on short notice (without explanation or anything). There were weeks she couldn't fit me in. She also threw me out of session after 20minutes on regular basis. Whenever she had to cancel, I was sure it was due to another client who was more important than me.
It didn't bother me, or at least I thought so. She was the T, I was sure she knew what she was doing.

Anyway. 1 year ago I've started therapy with a new T. He's very consistent, I always see him on the same days. There was one exception, where we had to reschedule, he let me know weeks in advance.
This consistency is gold worth. I feel much safer than with previous T( Although I still struggle a lot with trusting him, but that definitly isn't his fault).

What I want to say is: For me, consistency is very very important. It's part of feeling safe and appreciated, not feeling "too much", etc.

Please take care. I know you adore this T, but I also think that you should try to value yourself a bit more than her... It's not your job to make your T happy. You don't need to counsel her if she's feeling bad (uhm, which you mentioned in an earlier post, I think). There's only one "you".