Sounds like you defiantly have ADD if not ADHD. I was only diagnosed after I left the structured system of school and university. As soon as I didn’t have a goal to work towards my life fell apart.
Procrastinating then hyper focusing on tasks and forgetfulness were my two biggest indicators of ADD. I also suffered from mood swings, anxiety and what I call rage fits (sudden onset anger for not reason). I’ve only been on medication for a month and I have only had one breakdown in that time which used to be a weekly occurrence.
Never hurts to get these things checked