I've had something similar. Sometimes I realized it was that I wanted to share something during session but didn't. And then I had to wait till the next session. Other times, I felt I revealed too much and felt exposed, which could make me feel the desire to check in with my T to make sure all is OK. And other times, I felt really connected to T (or ex-marriage counselor), which led to the urge to wanting to reach out to them. And I guess other times, I've just felt totally wiped out, like I used up all my brain power and emotion on the session and want to just curl up and go to sleep, or at least not do work or talk to anyone else.