My 14 month baby has had a fever for over twelve hours now ranging from 101.5, 12 hours a go to 99.1 2 hours later. after Baby advil. since then has been above 100.5 three times since over next few hours and now 12 hours later had a slightly greater than 100.0. How long should i wait. Baby is lathargic and fussy, but not pulling ears or crying. In the middle of the night shw woke repeatedly, and was grunting as if she had the chills? What is the next step? thanks