I have a 10 year old daughter who has been showing symptoms of the flu since last Friday. Coughing, fever, chills, aching bones (mainly legs and back). The fever peaked at 104 degrees on Monday. On Tuesday, I was able to ge thte fever down to 100.3 and as of this morning, her temperature was back to normal. Oddly, she fell over a huge chair this morning and said that she was "blind" and that everything had gone completely black. This occurred again a couple hours ago. She could see nothing on the television. The vision comes back but starts off really blurry. Could this be a symptom of dehydration?