Depression residual symptom. Used to be?

I have recovered from major depression symptoms after suffering for 2 years from severe suicidal and dysfunctional depression but after that my intelligence is not working like before. I used to be a bright student but now when I study my ability to grasp concepts and retain things in memory, take interest in things has diminished. The hen I try to force myself to learn something just in few seconds my forhead starts sweating. I have a feeling that due to depression this has happened to me and it is not going to get better as I'm having these symptoms from an uear and my psychiatrist and psychologist don't have a clue that what to do. I read on google that people who suffered in teenage are having these symptoms after their recovery but they are trying to cope with that. What can U do.l, can I ever become intellectual like I used to be?? Multiple doctors plz help