I don't even know for 100% sure I have it but the last time I tried to talk to a professional they basically just wrote me off because my grades were good as a kid, I understand part of the diagnostic criteria is symptoms presenting themselves in childhood but to be honest I got by just fine without studying or paying very much attention.
Does anyone have experience with this
Not sure where you live but there's a ton of hoops you need to jump through to get a diagnosis and a prescription in the US, at least in my experience. I got passed around between like 4 different people and go through fairly rigorous testing before getting a diagnosis, and someone else needed to be the one to prescribe me meds.
I've never heard of primary care physicians that will prescribe adhd meds to adults because most are schedule 2 drugs. I guess if you're already seeing a psychiatrist for something else you could ask about it, but primary care won't do shit in my experience