A person presenting inattention symptoms, agitation or impulsive behaviours does not necessarily have ADHD. There are several criteria that have to be met to establish the diagnostic.
If you suspect ADHD might be involved in your issues it is very important to learn as much as you can about the condition.
Adults with ADHD
Until a few years ago it was believed ADHD would naturally disappear during the teenage years. However, recent studies have revealed that about 50% of children with ADHD will continue to exhibit a significant clinical presentation as an adult.
Children with ADHD
And if it was not a matter of will... ADHD is a neurobiological disorder. It is not caused by parental pratices or a reflect of the child's temperament.