Hi,
Yes they can be related as far as I'm aware. I get anxiety, brain fog, memory lapses and mood swings. These have not been as notable now the anxiety of not knowing the cause no longer exists. Been cleared of having Parkinsons and MS. I used to get periods of depression without a cause, knowing the causes of my afflictions has stopped that. Found if I keep the mind and body busy I do better. When I sit down to relax things get worse as the mind tends to wonder. I seem to do better under a little pressure which tends to keep me focused.
Cheers