Keep remembering more terrible things

When I joined this forum and wrote my story, my goodby letter I really thought I did a good job. But, as I did work today on my 2nd step writing a letter from ex-narc to me i realized how much i truly blocked out. I know my Doctor says I have post term. stress disorder. Is that part of it.

I mean big things I forgot to mention. Really big things. What do i do keep moving on with the steps or go back and do more work?

Does this happen to you guys too??