I'm no expert but it appears your post displays some pretty clear indicating factors for symptoms of ADD/ADHD. If the scatterbrain existence is wearing you down and interfering with your well-being then it would no doubt be a benefit to speak to a qualified psychologist . What is encouraging is that these days there is alot of information available regarding adult add that just wasn't around as early as just two years ago... when I googled it back then only one page came up and it was "in progress". There's many more resources at your disposal now. Keep looking around and don't procrastinate(another add marker) too long before you consider seeing a good psychologist. If you're worried that you'll draw a blank(yet another marker) when you meet the doctor, print out a copy of your post and bring it with you for quick reference. It certainly contains alot of your concerns and would be helpful to have at hand.

Stay Positive... Peace to you