Therapy only works if you show up, just like occupational therapy or physical therapy. So that isn't your T's fault. You don't have a consistent schedule so your not building a rapport. Each session would ideally build off the previous one. If you don't go, then it's scattered and not surprising she's forgetting some things.

I think it's important to have clear goal set for your therapy and discuss those when you begin treatment. If you don't know exactly what you are looking to accomplish in therapy then success will be difficult.