If that happens to me, I remember what my T said to me once, "you don't have to come here and perform for me." That let me know his expectations were different for our sessions than mine. He had much more low key expectations. That took some of the pressure off. If I am feeling like that now, one thing I might do is decide I would just go to the session and let whatever comes up come up. I would take the pressure off myself and just try to be in the moment and be open to whatever arises. Some of my best sessions have been this way, and the things that came up were sometimes surprising! I don't think my T expects me to report on my insights and accomplishments. That would be hard to do every time! (Maybe I just have a low work rate?)

Good luck with your session.