Can you expand on this at all?
I get going into a self-preservation/protective mindset before your T goes away. Part of your support system will be absent for a while, so it makes sense to sure up the walls of the fortress and make sure they’re all still solid.
For me, it would depend I think if I was going into a “preserve me” headspace, or a “preserve the team” headspace. If I try and preserve me? Well, that’s pretty much what lead to my brain deciding it would create additional parts - to preserve my concept of “me” (your ANP).
But now that I know I have parts, I can’t just protect “me”, because building a protective wall only around myself presumably means my parts will be on the other side of the protective wall. And connection with them will go. Just like it did when that wall was used to protect me from my trauma.
Does that make sense?
Usually with these issues I start by going back to communication. Maybe asking your parts “How is T being away going to make you feel?” to each part. For those that have stress associated with T leaving, ask the parts that don’t “How can you help relieve that stress?”
There will probably be parts that don’t care at all that your T will be away (parts that therapy doesn’t much relate to), and some that might even be relieved (protective parts that get challenged by therapy).
This might be an occasion where coping skills from those less effected parts, or at least, more interaction from those parts, might be helpful?