Ugh... I hate waiting for responses too sometimes.... no great advice, other than to try to think of some reasons why she might want to wait that aren't as negative (i.e. she wants to clarify something and feels it's easier to do in person, maybe she has a lot she wants to say and doesn't have time to type it up, maybe she wants to be able to be respond carefully and watch your reactions?)

It's hard, but I try to assume the more positive reasons (i.e. give people the benefit of the doubt). Sometimes more for my own state of mind (to stop the worrying) than the other person - though I 100% get why this would be hard/impossible with your T, given the problems you're having with her.

Good luck... as for distractions, maybe you could research other places nearby to take riding lessons, since your instructor has quit? Find some interesting recipes to try online? Check out a farmer's market? Sing loudly some songs that do a good job of capturing your feelings in the moment? Write a song, or fairy tale, or poem about how much therapy sucks ? (I just found a sarcastic multiple choice test I wrote for Ts after old T dumped me... like 15 years ago. It's still funny to read, though obviously a bit bitter!)