You just go see a psychiatrist or a psychiatric nurse practitioner and ask them to perform an evaluation. Many GPs can also perform/refer you as well. ADHD understanding and awareness was very low before the 2000s/2010s many people in their late 20s/30s/40s went undiagnosed.
I had even stereotypical symptoms as a child but just wasn't tested.
I had even stereotypical symptoms as a child but just wasn't tested.