My 5 year old came home from kindergarten yesterday looking very pale. A few hours later, she began vomiting and developed a fever of about 100.5, It was a warm day yesterday and I know they had recess outside. She also has a longer bus ride home. She had no other symptoms except she was very tired and no appetite. This morning she slept very late. When she got up she ate a lot and drank a full box of juice. She doesn't look pale, etc. Any idea if this is a virus or maybe something to do with heat?