I have a kind of "information war injury", which seems a bit pathetic, but affects me a lot. When I sit down to do any kind of focus task, like reading a long article, or sorting out photos, or reviewing a paper, I might get a few seconds or paragraphs in, then I just freeze up. There's no more focus to give, and my mind doesn't want to take more in. There isn't reconciliation of all the stuff already inside, and more just provokes anxiety and rejection. Even conversations with people leave me exhausted, so I mostly avoid them. Then I get anxious about not really doing much "real" work, and being endlessly in a precarious place, which makes it worse. But I am genuinely finding it hard to work. Burnout from overdoing it for so many years has just left me empty. I might manage an hour or two, then need to lie down for a nap. You can only do 12-14 hours a day at screens for so long, until it does you actual damage. But it's all invisible and psychological, so doesn't seem so real.

Your description of the situation sounds very similar to that of electrosensitivity. Blurry mind, lack of concentration, tiredness, etc. Wi-fi, microwave radiation from towers, routers and cellphones is invisible but very damaging to the brain. It reduces oxygen bloodflow to the brain. I have suffered greatly from this for many years before realizing that it was at the core of my lack of energy. I have had to quit my job working for a cellphone company. Now that I live away from a big city and all these radiations, I feel much better and whenever I am close to a Wifi, it all comes back within a couple of hours. I have long blamed myself, thinking it was the stress or the way I look at life (doctors were telling me it was in my head), but now I know better.
I am not saying it's your situation, but take a look at your environment. You might find some answers. Hope that your health problems get resolved and that you feel better soon.