I was diagnosed with Guillian-Barre Syndrome 3 months ago. I am fine now, but for the last 4 weeks I’ve had a terrible itch/pain on my back that is worsening. My neurologist prescribed Cymbalta, but I’m afraid of the brain fog that so many people have with it (I had it and memory problems with gabapentin. I need to go back to work but won’t be able if I’m not functioning well. Any thoughts or suggestions?