Not ADD, but bipolar with anxiety, a very short attention span, and frenetic bursts of activity during my manic episodes. I saw that no one had answered your post, so I'll offer you what small wisdom I have.
For one thing, I know how it feels to never hit the right balance between doing/being too much and not doing/being enough. I'm the one who's always just about 5 degrees off 'normal' and can't seem to achieve it, no matter how hard I work at it. But you know, there's a place in the world for all of us......we merely have to accept that NOBODY is as occupied with us as we ourselves are.
A lot of what we take personally really isn't personal at all; our perspective is colored by our mental and emotional makeup, and sometimes it's hard to reconcile that with reality.
If you can remember this one thing the next time you feel nervous or like you're under scrutiny, you'll do fine. I wish you the best.