I don't know if what I do qualifies as journaling, but I nearly always write after a session to remember what we talked about. This has come in handy too for times where I feel alone, and I can go back and read about a past session we might have had where I felt some sort of connection with T and it makes me feel slightly better. T hasn't told me to do this (past T or new T).

Past T told me to journal my nightmares so I did that for a while too, but it got to be overwhelming so I stopped. I did find that difficult to do, it was time-consuming and it put me in some pretty bad states at times.

The current "journaling" I just do it because I want to. I don't journal every day or anything, just after session. I guess my journaling isn't really full of feelings which is probably what you're referring to? It's just a statement of facts for me, with some feelings snuck in there, like a comment on a look my T gave me when I said this or that, or a question she asked me that made me feel strange or that I had a knee-jerk reaction too. Maybe start out by just writing once a week and seeing how it affects you? I have found that it gives me a lot of new things to talk about the next session, when I objectively look at my reactions to some of the questions she asks me.