Having trouble sleeping, impulsiveness, losing things, lack of organization, not remembering things - are all pretty classical signs
of ADHD.
Of course, the whole relationship with the parents thing if caused by you constantly getting into trouble (and negative attention in elementary school), is also a sign of ADHD.
If you want to gather more info, two sites aimed at the adult ADD sufferer that you might want to check out are totallyadd.com and http://jeffsaddmind.