Well I found out why I had lost my energy. Right after posting last night's entry, I crawled into bed feeling very cold.
For the next four hours I was curled up and feeling cold despite my body temperature being particularly high. Then about 11pm, the fever broke and I felt very hot. After another couple of hours I was back to normal temperature regulation and was able to sleep properly.
I am glad to be feeling somewhat more like normal though was still pretty tired throughout today. But am mostly glad that I now know that I was fighting this bug and that was why I had no energy or enthusiasm for anything.Go Top