I agree doctors are no help. I asked my rheumi and he said to talk to my neurologist (I have trigeminal neuralgia and also increasing white spots in my brain). My neurologist had no idea either. I cant give up the coffee because I need the caffeine to focus. Im so sorry about the teaching and the issues it is giving you. When I was still working as a senior journalist I was lucky to have a very good friend sitting next to me in the office who helped me find the words I kept losing -- like, you know that think that does x y or z, or the word that means something like ... Sending love.