Has anyone Baby keep on having Fever? Like on and off?

Like my Baby Just turn 10m last 2 weeks he Just recover from Fever and Finally get to return to school on the 3rd weeks which is this week. Morning he was all Fine active Happy suddenly Close to evening time which is the time im supposed to Leave house and go fetch him from school suddenly school Call and tell me he Have Fever... 🤦‍♀️🤦‍♀️🤦‍♀️🤦‍♀️😭😭😭 and really have Fever. Does anyone Baby kene before? Im quite concern.... Because is a Baby boy so boy very easily get fit when they Fever im damn Scare. 😞😞😞😞#pleasehelp #advicepls #firstbaby #firstmom