My kids both have had fevers my DD lasted 5 days again fine while Nutofen was in system and working then crashes. She would be playing then next min. Downhill and taking a nap. He now has a cough. My DS is on day 2 of the same thing he's has a chesty cough now too. Both their voices are husky aswell. We went to the Dr and he said its a virus. Hope your little one feels better soon