My place of work were the opposite - but it ended in a long fight for me, it was like watching something slowly die in front of you. No matter how hardn i tried I couldn't produce what i used to.
My thoughts are with you for what you are going through.
I only discovered headway a few months ago - but I find it keeps me going with the dark days. Today is a going to be a dark day.
I know you will understand when I say I can go from 'actually ok' to zero and dark in moments. Its a horrible place which I wish I had never seen.
But there are many on headway suffering a lot more than me and some that have been 'there' and have come through. I talk strength from these lovely people