The most prominent was muscle pain. Sports made it worse but kept trying to follow advice to do a little/some exercise. I had over 100 physiotherapy (=physical therapy) appointments as I kept developing strains of one sort or another.What were your symptoms for the first few years?
Some fatigue.
Cognitive problems (memory not as good especially for some types of things e.g. learning-by-rote e.g. poems, quotes in literature; but also an increase in clerical errors when solving mathematical problems)
Some unrefreshing sleep and related (some difficulty getting to sleep - needed a long-wind down period and still had more difficulty than peers).
I vaguely noticed that sometimes when I was standing my concentration would not be as good but only really noticed that looking back (or perhaps I would have said it if a clinician had asked me).
I noticed that if I got excited, it took me a while to fully calm down.