Oh, yeah I know all about
the brain fog! I've been having some lowering of my ability to retain stuff and memory(grocery lists, I can't add, subtract and multiply in my head anymore) since i had radiation for my 2nd brain tumor in 2008, and I've been on and off hormones and pain meds since i had to have a hysterectomy and i have Fibro now too but it is nothing like this EBV/CFS fog or fatigue
Wow. I have the vit D definciency too, I ve been on supps for about
6months, just went up to 5000mg and it finally starting to help a little. I also came off the narcotics
that helped too, I have actually started taking diet pills to get up and function, their magnesium and green tea, that other stuff gives me gut ache and headaches. Hope you find a better solution and a better doc(than mine)