Wifey, we have quite a commonality--I have ADD, too (actually titled by my doctor as ADHD-Inattentive). I have been medicated for more than a decade, and I'm a much better person for it!
In theory, my H understands ADD, but I don't think he fully understands how it affects so many aspects of my life (or our former life together). Even with medication, my limitations are not completely resolved, and I'm afraid he thinks they should be. I also don't think that he can see that he probably has some ADD, too, though his is more along the impulsive plus inattentive lines.
ADD caused significant difficulties for me as a child and as a teenager, but I developed some excellent coping mechanisms. Finally, more than 10 years ago, the intense stress of a family issue caused a "break" in me that necessitated pharmaceutical help. The medication made all the difference in the world for me, and I'm happier knowing that I'm capable of functioning like others around me.
Welcome to the club, and please let me know if you ever have questions or just want to talk about things. Hang in there!
Oh, there's another great book, too--it's called Driven to Distraction. Check it out if you haven't already.