I had always thought I had it but never trusted my self diagnosis or had a good doctor relationship since I was an adult. But the main thing that spurred it on was I was at work and someone that I’ve worked for for nearly 8 years daily in close proximity that I trusted told me that when he first met me he just assumed I had it because I would hyper focus on tasks and ignore them because I was too focused on my tasks and that I would switch talking about stuff mid sentence.