Even though it's a condition that is also quite over diagnosed, it's simultaneously a condition that's underdiagnosed IMO - it really depends on where you're looking / sampling. A lot of kids fly under the radar, because they don't show any obvious signs, even more so those with ADD / non-hyperactive.
But then the bricks fall in their place, and they can try to redo all that. Unfortunately, by that time, a lot of doors have been closed - especially if you want to work in tech or professional industries.
Now, I'm not trying to scare posters, but it's much better to get that stuff figured out before you've gone too long to make lasting damage, both to your own health, and to your professional life.
I was alive, but not really living. I could not get the simplest things done, only things that were fun or immediately rewarding, at times barely that. It reminded me of what people referred to as depression, but without much of anything that could actually be called depression, not without doing injustice to anyone who have ever suffered an actual depression.
Don’t let the years go by, moderate consumption of stimulants can be really beneficial for someone with ADHD, and you don’t realise this until you’ve tried.
No harm in talking to a professional about it.