Hi Luc!
I have the same cognitive problems at 40 months off (Sigh :((()
I have up and down:at the moment I don't feel very well and the cog problems are increasing.I am unable to read a whole book and writing is difficult:It's as if I had nothing interesting to say...
And the difficulties get worse when I have to write in english .These problems can surely be related with my current high level of anxiety.