I will keep my fingers crossed for you! I know how horrible that feeling is. The concentration/brain fog issues were even harder to deal with when I was trying to work. I look back now and can't imagine how much stuff I messed up. I even called my old boss on my one year anniversary to say I was sorry for whatever was coming back because of me. I just didn't know how bad it was until much later.
It might be a good time to get to the doctor so he/she can see you like this