I literaly feel that I have a fog in my head, and feel like I am behind the world looking at it, with a fog in front of my eyes. I used to be fatigued as well, however I started taking
B vitamins and they helped a bit. I took anti-depressants for a while, however while my mood improved the brain fog did not go away. I have come up with several ideas as to what this may be: b-vitamin deficiency, hypoglycemia, diabetes, potassium deficiency, candida overgrowth.