I self diagnosed before getting my formal diagnosis from a doctor. I was a hard yes to like 30 of the 32 signs of adult ADHD in Driven to Distraction.

At some point it's kinda a relief to realize that other people are going through the same stuff as you, and start therapy and treatment that are actually catered to your needs since you've already tried a million other things and nothing has worked.

And yeah everybody struggles with executive function and attention sometimes. But like, we all bleed when we're cut, doesn't mean haemophilia is fake.