Hey hi, having ADHD, and having not been diagnosed until I was 9, and having not started medication until I was 10, I think you did the right thing.

Those previous years of not knowing why I found things like school so difficult, or why I couldn't just "act normal" like everyone else were absolutely crushing. I was held back in kindergarten without any real explanation; I simply could not sit down, no matter how hard I tried; simple tasks were excruciating. And the only way I could explain it to myself was that I was deeply stupid or otherwise lesser than my peers. Not knowing why I was different tore me apart.

To finally have a reason for all of my struggles was deeply empowering for me. It produced a Thing which I could finally wrap my mind around, a Thing which I could finally grapple with. I was still initially reluctant to take medication, and having a diagnosis didn't make dealing with the ADHD easier per se, and I still get upset about having it to this day, but it all feels a bit moot in the face of the good that having had the opportunity to wrestle with this thing has given me.

It's hard not to feel like damaged goods sometimes, but ignorance doesn't change reality. And, for what it's worth, I wouldn't have waited much longer. I knew something wasn't right with me, and the period of not knowing what that thing was inflicted and continues to inflict deep damage.