There are things that can cause dissociative disorders other than parental abuse. There could be abuse by someone other than a parent, premature birth, painful medical procedures and other things.

For most people, DID starts at a young age, so it would not be unusual to have dissociated as a young child.

For me, figuring out why I dissociate has not been as helpful as working to integrate, and I have needed an experienced therapist to do that. I think you may need to work with someone with experience in helping people with DID to get an accurate diagnosis and understanding of how to heal.

I am sorry you are not getting answers. Losing time can be embarrassing, dangerous and confusing. It caused me to isolate, which did not help my recovery.