I once told my former T I was used to journaling, since I'm really shy and I can't talk to people about my stuff, so she decided it would be interesting if I brought it to therapy. It may have helped but the issue for me was that most times I ended up crying while I was reading out loud. I know that's not wrong per se, but maybe it was too much for me. The first few attempts to read my journal to T failed because I was so embarrased. I don't do this with my current T but I haven't dropped journaling because I've done it since my pre-teen years and it has actually helped me a lot. Of course, I only speak from my own experience.