I just got back from my P-doc appt a bit ago, so I'm feeling full of info at the moment. So bear with me.
At my first visit, he thought maybe I had AADD, but that you always treat depression first. He also gave me some Ambien for a 2-week trial. I felt GREAT while taking the Ambien. I could concentrate and do my work like a 'normal' person. Once the Ambien ran out and I went back to having insomnia, the concentration and focus went down the drain.
I mentioned it to him tonight and he said that insomnia will cause cognitive impairments and problems with memory and concentration - the problems I'm having. He's going to keep me on 5 mg of Ambien if taking a "sleeper" as he calls it is as or more effective than a stimulant would be. It also won't cause the anxiety like a stimulant can.
So maybe you and your doc can try to see if getting a good night's sleep does as much for your attention and focus as taking Adderall does, but without increasing your anxiety. Just a thought.
I know I function horribly without enough sleep, it makes everything seem worse than it is, and I haven't been getting enough sleep for years. Can't fall asleep, once I do then I can't stay asleep. Nine hours in bed might give me 3 hours of interrupted sleep, so taking a small amount of Ambien gives me 4 solid hours and I feel like an entirely different person the next day even though the last 3-4 hours in bed are mostly just laying there and enjoying the warm blankets and soft pillows.
I hope you and your doc can get this taken care of soon. I know how horrible it can feel.