Were any of you able to get diagnosed without having someone from your childhood for your past?

TW: no contact with toxic family

Hello everyone. 😊

I have my neurophysiological assessment scheduled for July. I have people in my present day life who are willing to answer questions to help my assessment but I do not have anyone from my early childhood who can help as I am no contact with my parents and my remaining family members are either younger than me or did not observe me consistently enough.

Were any of you in the same situation when you went for your evaluation? How did it affect your outcome? Were any of you still able to be diagnosed without the help of parents/guardians?