I sometimes (often) used to be the same when I was consulting a T once a week. One the day of the session I felt fine, I felt anxiety but that is ''normal'' for me. It probably was a protective mechanism, but it didn't protect me. It resulted in the therapy lasting a long time and maybe not ''achieving'' much..

Tell the T as many details of your week as you can. And observe her words and reactions/responses.

Hugs and respect to you