I'm not sure either, but I think you should tell your T what you posted about needing a plan more than "call me". See how she responds.

I'd be very upset about her forgetting your appointment, but it could be a one-time occurrence because you're new. Not that it ever happened to me.

If you liked everything about her and you said you didn't click, I'd say to give it a few more sessions. It doesn't seem like a promising relationship, though. I still think you should give her a couple more sessions, or at least one to ask her again, about wanting a plan.

My current T takes notes only when we do EMDR; I don't think most Ts take them. They want to have eye contact with the client, and it's distracting to take notes.

Good luck whatever you decide!

If you decide to switch, you can just tell her that you don't think it's a good fit. You don't have to say more than that.