Hi, I have CFS and am having a real struggle with this symptom and fatigue. Has anyone who had "brain fog", difficulty seeing, thinking clearly, concentrating, etc. beat this by some kind of treatment? The doctor I have now didn't want to give me antibiotics, but just gave me Valtrex which doesn't seem to make me any better or worse. My recent lab tests were EBV positive, but the doctor didn't test for mycoplasma and I am wondering if this might be what causes this symptom. Anyone successful in beating back the "brain fog?" Thanks!!