It's often also helpful to become involved in ADD-focused couseling with your spouse so you're working together to understand ADD behavior patterns and to find solutions. You make a good point. We live in a highly distracting, information-overloaded environment. All of us are challenged to maintain focus and to be organized in the modern work environment. Those of us with ADD are even more challenged.
ADD is a disorder that lies along a continuum just like anxiety and depression.
It's only those at the far end of the continuum who receive a diagnosis of ADD, although all of us have experienced ADD-like patterns. I believe I have had this all my life. Often the best people to consult are child specialists who have over the years expanded their practices to include treatment of adults. Diagnosis can be obtained from clinical psychologists and from psychiatrists as well as pediatricians and neurologists who have experience in this area. However, it is not always to your benefit to insist upon accomodations from your employer.