I'm not sure what else to call it, I didn't know there was such a name in the first place! However, I can relate. I spent a lot of time alone and isolated in the summers of my adolescence, and I sometimes wonder what kind of impact that had on me. Perhaps you don't need to have a specific name just to tell a therapist. I think you can just talk freely, and the therapist will understand. That's what they're there for. Hugs to you.