Yes my ADD went undiagnosed, for me, it was because I am an emotional person, and love the emotionality of therapy, pay attention fine during a therapy/pdoc appt, because that is my language, emotional language...come the real world...full of boredom not a lot of emotionality..THAT'S when I need to keep changing my location, my ideas, physically move, so there was no way for my Pdoc to know what about me he sees me in my, best element...

You could take an online test about ADD and show your Pdoc the results..or even show him your post here..or literature you relate to whether it's a book or pamphlet...

What symptoms do you have that you can share with your doctor? Perhaps if you're more specific..