I have been recommended for testing but decided not to pursue it since it serves no purpose now. This was after 11 years of struggling in school with accompanying low self esteem issues, depression and such things. It MAY NOT be proper ADHD because the psychologist's suspicion is that I may have sensory issues which make me seem like I'm ADHD, dyslexic and dysgraphic. But whatever the heck it is, it does interfere with my life and I work with my therapist on modifying my life and behaviors to make it less interfering. It may not be practical for everyone but the thing that changed my life was changing jobs. I now work in special education where I'm required to be extremely active and be able to do ten thousand things accurately at the same time. Which is terrific because it puts all the annoying ADHD-ish traits to a use that is functional. And I find that after chasing around kids and multi-tasking like my life depends on it for 5 hours a day, I can settle down relatively ok to finish off paperwork for the next 5. There are other things like forgetfulness and the hyperactivity but I figured out what helps with remembering stuff and also what I need in order to avoid hyperactivity (enough sleep because exhaustion dulls my senses and I will seek out more extreme sensory input like spinning on chairs or jumping around, none of which are appropriate, to get some sensory input).
The thing is, it takes a long time to figure out what works for you. You may need meds, you may not need meds. Along the way, there will be people who tell you that you're just imagining things, like this neurologist I was sent to who told me that all I needed was a larger dose of psychiatric drugs to stop thinking. But keep looking for information that helps you, get a professional's help if you need to, keep going at it. It will get better one day.
"My school is the doubt in your eyes." - Tito Mukhopadhyay