Fever won’t go away

AB

So on Tuesday my daughter started getting sick. Runny nose mainly and small fever. Later ended up going to the ER because get fever spiked and she head a seizure. They told us to give her ibuprofen every six hours to keep the fever down and sometimes it's fine entirely and then back at 99.7-100. so stressed out and worried about my little girl. Going to call her Dr but wondered if I could get any advice on here.