Hi lovely,
The first few sessions with a new T can be hard because they are trying to understand what we choose to mention and why it's significant. Saying that, I can understand why you felt invalidated with a few points. When my T goes off tangent, I usually write something down so it gets the communication accurate. I wasted years being too afraid to correct T, but know now I won't be able to heal unless I speak the truth.
I'm sorry your session was so difficult for you, when are you seeing T next?