Late 30s for me as well. I'd been struggling to get things done at work and around the house and reached out to a counselor/therapist to talk it over. He immediately identified ADHD symptoms and helped me 1) connect with a psychiatrist 2) lay out and practice the language I'd need to accurately communicate it to the provider and, maybe most importantly, once I started medication...3) help me identify, practice, and reflect on systems in my life to make the most of my new brain chemistry like productivity tools, meditation, etc.

Highly recommend adding some sort of therapy visits to your care if that's feasible.