Hi Mkac,
I think you will probably share as you are able to, at least that's what I do. You can work on both the depression and the past as you are able to do so.
I find that journaling helps me to get it all out there. Also, I record my moods and daily feelings so that I can work on cbt when I am not trying to reconcile the past.
Either way, I've been told that it takes time. I'm still early in my treatments, so I'm not sure how long it will take.
Good luck!
Bluemountains