I often get sore eyes when I'm sick. Perhaps you have some mild infection? It would certainly explain the fatigue. It could be an odd one, like one of the herpesviruses. An alternative possibility is mold exposure.

Task glasses might give temporary relief of the discomfort. They're just regular prescription glasses that put optical infinity at screen distance. This allows the ciliary muscle to remain fully relaxed.

Consider getting an opthalmologist to look at them, just in case.