You did a brilliant job with this prompt! I've seen a few Pevensie-has-a-fever fics before, but this one surpasses all of them, in my opinion. I love that Lucy has left to fight a plague, which not only ties in very well with Edmund's fever but also gives her a job to do as Queen besides being the cute youngest one. As for Edmund's nightmares, they really did have that nightmare-feverish quality of a brief scene of heightened emotion (or rather, in this case, a heightened sense of numbed emotion). Very well done!