I don't really have a treatment plan, either - although at the moment I have been set a goal of eventually exposing myself to everything I've mentioned avoiding due to anxiety. But my therapist hasn't said how long this is likely to take - which makes sense to me, because I don't see how you can know how long it will take (it's going to be different for everybody, right?), but it annoys my parents. They want to know when I can stop seeing him and when I can start seeing him less often. It feels like practically every time I'm alone with them they'll ask me, and I wish they wouldn't.
Anyway, I don't think that was much help, sorry, but that's my experience.