R.A.
It most likely is a virus. If she is able to eat, give her some saltine crackers and some good chicken noodle soup. The dizzy feeling is from lying down and not eating enough. It happens to most of us when we are sick and all we want to do is sleep and lay down. I would give her some Gatorade , the electrolytes will help keep her hydrated and less dizzy. The Tylenol is working if her fever is going down. 100/101 are very low grade fever readings. I would also give her a good bath, and just continues with the Tylenol. Hope she feels better soon!