I'm so glad you had the strength to go. I remember earlier in the week you were hoping you could hold on to your determination to go until Thursday, and you did! I think you're being a little hard on yourself in evaluating the session. It's my belief that no matter how badly the session goes, it's all grist for the mill, all something to learn from. Even the misunderstanding - you recognized it, and will probably try to be clearer in the future.

Notice that your T repeated back to you what his understanding was of what you were saying, and you realized that he was not getting the message you intended. This is a good skill to have in real life, to avoid misunderstandings. Don't feel bad that there was a misunderstanding - be glad that T acted in such way to reveal the misunderstanding at the time it occurred, instead of both of you going your separate ways with a completely different interpretation.

Anyway, congrats!