I have not had a dx of DID but do dissociate. It is very confusing place to be in as you describe, because from my own experience I do feel like a kid but I am full aware I am a adult. So I am unsure if it is DID actually. I have Complex Post Traumatic Stress Disorder which has very similar symptoms but is not quite the same. It is confusing don't feel alone in this keep asking questions.

Take care