The Exhausting Part of MPD/DID.
It seems like everyone wants to go there and that is okay. Of course it's exhausting but it WiLL work out.
If you have a core then the core will show herself or his self when that core feel comfortable enough to come out and show themselves.
compared to all the things you will work on, I think you will look back and see that having a core or Not have a core is not a big a deal as it seems for you now.
I have been here many times and I'm not meaning to blow "the core" off subject it s just there is so much else that I feel you need to deal with. No I am not your T but I am a peer that has been where you are.
You will see someday as you look back that its the foundation you build your healing off is the BIG DEAL. I do care and get it just trying to put my ducks in a row and it has worked out for me, I hope it will work out for you.
Peace and hey sleep while you can, healing causes a whole mess of conflicts

guys,
Crew