Maybe you can start by talking about your hesitance in talking about memories/flashbacks you’re unsure of, and why you’re hesitant? I discussed that sort of thing a lot with my T before I decided that I was ok with talking about flashbacks that I felt I couldn’t be sure really happened. I tend to do a lot of “talking about talking about things” before I launch into new territory, and I think it has worked well for me. My T has always been patient with it.