I really totally relate!! I've always been pretty smart, but as my ADD symptoms have worsened over time (I was on ADD meds til 7th grade, then went off them) I totally feel like a ditz even tho I'm really smart! It is such a horrible feeling knowing you are capable of so much, and being frustrated. I do and say so many "blonde" things... like saying I'm having a blonde moment to a blonde person!

Ok not just that but silly things, like not knowing how to react in a given situation, or knowing the answer to a question, but not being able to share it in spoken words. I started to feel SO DUMB, and my frustration was such that I took it out on my family. So the sent me to a therapist. :P That's when I was diagnosed (again) with ADD at age 27, just a few months ago. The medication helped a little, but it's just not the total fix i wanted it to be.