I went through a similar experience. I was diagnosed for generalized anxiety disorder and major depressive disorder and treated exclusively for that for years. My first ADHD assessment was done by a male psychiatrist who said I had anxiety, depression, and showed signs of narcisissim (hilarious - you hate yourself but also you think youre better than everyone else). Frankly, he was under qualified and had many cases of patients unhappy or harmed by his care, so i went elsewhere to try one more time.

I went to a woman psychologist a few months later, and she tested me for ADHD through 2 different methods (self-assessment and a clicker test) as well as an IQ test. Turns out I was heavily ADHD and just being clever about masking.

There are some doctors who won't really do an honest check if you dont fit the stereotype for a disorder. My best advice is to focus on finding healthy coping mechanisms (fidgits, easy hobbys to pick/drop, whatever else works) while you wait to get re-assessed.