(((Ster))) That can happen when you have covered either really intense material, or too much material in session, imo. Since it is a regular happening for you, discuss with your T ways of slowing down in session (not covering so much at a time) or give yourself more time to adjust back to "real life" here and now, before leaving the session.

I think dreams are a way the brain uses to help file events... sort them out, so to speak? Nightmares, well... maybe those are the events that won't go quietly??? IDK. I can have night terrors. I understand...

It's ok to slow down. It's ok to work on something and leave it for a bit, and come back to it, or approach it from another line of thought. TC!