Fellow late diagnosis people, what ultimately made you start suspecting you had ADHD

I suspected and asked about ADHD funnily enough from an askreddit thread. I don't remember which one, as I've seen similar comments since then in a few different threads.

In it the guy discussed being diagnosed with ADHD in a later stage of his life. He listed out all the symptoms he had and explained he wasn't diagnosed as a kid because he was quiet and never caused trouble.

Reading this comment, every symptom he listed, every part of his life, his difficulty with tasks, and so on I read and went hmmm that's exactly like me. This is way too familiar and similar to how I feel.

Since then both my counselor and my psychiatrist have both questioned what the fuck people were doing when they didn't diagnose me as a kid. As it's extremely obvious when talking to me for more then 30 seconds. That was definitely a relief to hear.

So what's your stories? What made you start to question and suspect it?