My parents actually took me in two separate times as a child for a professional opinion. The first one basically said I was too young to look into it, come back in a few years. The second one (different practitioner), a few years later, said I was just "too smart for my own good". My parents always tried to challenge me in school. I learned just recently that my mother would actually go into school at the start of the year and tell my teachers to have extra "work" or "tasks' for me, or I would get bored and talk a LOT. Lol! Looking back, I totally agree with this.
Working with my therapist, I brought this up to her casually one day. She giggled (we have a great therapy/patient relationship) and said, "I am SO glad you brought this up! I would like you to see so and so and have a reevaluation of your symptoms and diagnosis, as I don't think you fit this criteria any longer." I was diagnosed with depression, anxiety, mild OCD, and BPD as a teen.
I think my parents did really well with the knowledge they had at the time. Diagnosis of ADHD isn't black and white, and the science and research behind it has come a long way, especially in women. Most people look at me and say, "she has it figured out. She is intelligent and put together. She has a career." Blah blah blah. ADHD can look so different from just bouncing off the walls.
I appreciate what my parents did for me then, and what they are doing for me now, being diagnosed in my early 30s, and looking back and realizing that my behaviors weren't necessarily anyone's fault, but the result of an undiagnosed neurodivergent brain. We've been able to do more healing (which we had already done quite a bit). I was quite the jerk as a teen, and gave them a run for it often, but they never stopped trying to build me up and supported me in all my crazy ventures from then until now.
Sorry for the novel.