welcome to HCM
read your prob, there are many causes of fever
at this age most likely eighter due to viral or UTI. so get her blood report like CBC, Ps for Mp, urine analysis. then consult your doc.
in case of children do not do drug trial at home as in children dose depends on their weight, low dose cannot works n high dose has side effect.
Dr aseem saraswat 9982583020