I guess you could ask your T to let you know how much time is left in the session before you are ready to leave. My T always finishes about 15-20 mins before time is up and asks me if I want to do any relaxation. We always do this and I don't feel like I have been left up in the air. My T also asked me what specific parts of my life I felt I wanted to work on, rather like a time line. She asks where I want to start for next week so that every area is explored. Perhaps you could ask your T for a more outlined structure for your sessions so that you know where you are and do not end up feeling like you have been in your sessions.

Please tell your T what you have expressed on here. They should be allowing you to feel in control of your therapy.

Spirit x