sorry to hear you've got a probably dx. Yes the cognitive problems, the brain fog - I call it the 'floaty balloon-head'
With me it comes and goes. Settles in for weeks at a stretch, magically lifts for no apparent reason. Returns to visit often. Pain in the **** but coffee, cat-naps in early afternoon (if you're working I even found 20 mins nap on the office floor did work), and NAC - N-acetly-l-carnitine (supplement) helped me but in a limited way.
RR-MS dx 1998 and Coeliac dx 2003
Copaxone, Cymbalta. EPO, Fish Oils, Vitamin D3 2000 IU daily, Cal/Mag/Zinc, Multivitamin/mineral, Co-Enzyme Q10, Probiotics, Milk Thistle.