some say that the longer you have ME/CFS the symptoms can change, I know I was closer to my healthy function in the first 6 to 9 months of the illness ! then I was very ill for a period of around 3 to 5 months, recovered to moderate but I remember at that time I had to be quite careful still, I had a lot of orthostatic intolerance and my brain would be overwhelmed easily by 'visual clutter' and I found it hard to relax, so I often wore a VR headset and lied down and used my computer that way, I have over 5000 hours logged onto an app called Virtual Desktop because of that. I also had quite a lot of brain fog at that time and felt half asleep most days at times. Things improved in 2018 and 2019 I think and those symptoms that were a hangover from the first year of the illness seemed to improve. I was quite active in 2021 and 2022 and I would go deep into the countryside alone with my homemade electric bikes, into the middle of forests and other places miles from a road where I would sometimes have to lift the bike up to get past fences or gates. I could even peddle a little without doing much harm to myself, but I reserved it for the worst hills and when my batteries were low. Prior to this I mainly used a mobility scooter but even with that I found that it could be quite a workout for your arms, and there was some mechanical work involved if you got a flat tyre.
My new symptoms are crazy and I wouldn't wish it upon anymore, i'm still searching for answers about it. I find myself wishing that I 'just' had normal ME/CFS like before, by which I mean moderate because being stuck in severe CFS is another kind of torment that I wouldn't wish unto anyone, I don't know why but my dips into the severe state were always short. Once I stopped being mild though, I never got back to mild again, and I don't really know why, it was about 8 months past the onset of the disease, prior to this point I could walk for miles albeit slowly, after this flare up / crash where I had an intense upper neck pain and felt fevered / dizzy I could no longer walk more than a few hundred meters at best, and never got back to that mild state where I could walk to town and back.