a.)
My ME is listed as "Tiredness syndrome of unclear aetiology", which is just about the closest you can get diagnosed with in Germany. ME is, for all intents and purposes, a nonentity over here. It does not do my severe insomnia, the fact that I am nearly fully bedridden, or my experience of PEM any justice. I fail to see where the "tiredness" part comes from, given that I only sleep 3-4 hours per night.
Mild cognitive impairment is noted on my medical records, but only as secondary to depression. I'd like to see the kind of depression that would induce deficits akin to the ones I experience. They do look "mild" on paper, but my records do not take my premorbid state into account, in which case they would look dire.
b.)
I developed several phobias that I did not have before. Heights sketch me out now, and so does seeing blood and gore. I hate the term, since it is so easily abused in the BPS context, but I equate this with some form of sickness behaviour; adaptive behavioural changes "meant" to protect me from additional insults.
In periods of severe PEM, I suffer from sleep paralysis, during which I experience awful nightmares. I generally end up waking up from them screaming. I'm not inclined to tell any doctor about this, since they'd probably try to slap a PTSD diagnosis on me. Note that I never experience these nightmares unless I have physically or cognitively overexerted myself - which one is all the same to my body. I also never suffered from nightmares prior to falling ill with ME.
Sensitivities to medication are documented, but I believe that they deserve more attention, and could possibly even generate hypotheses regarding the pathophysiology of ME. Serotonoergic antidepressants worsen my orthostatic intolerance drastically, and stimulants are just completely messed up. Not only do I not experience any of the expected cognitive benefits, but they do not even raise my heart rate, cause vasoconstriction, or do anything that should be characteristic for that class of medication - even in heroic dosages. At worst, I just suffer from PEM not long after, and end up falling asleep. Sedatives actually slightly increase my energy levels, but they do not change anything about my PEM threshold, so they're never worth the risk.