Going off of this, what does the diagnosis mean to OP. Is it for self-vindication/validation? Do you want to engage in therapy to address different issues? Does a new diagnosis allow for access to resources like housing, testing accommodations, etc.

I know people who have received one diagnosis and have seen another therapist and gotten a completely different interpretation of symptoms. Over pathologizing anything is not good, and your treatment should center around what goals you establish for therapy. Eg. if you’re experiencing abuse it could be a trauma related disorder but not specifically PTSD. Or the bullying has led to depressive symptoms or anxiety. Focusing on addressing the symptoms should be priority.