Girls, please help my son who is 2 years old. His temperature has been…

Girls, please help my son who is 2 years old. His temperature has been 38.9 for three days. I give him paracetamol suspension every hour, but it's not effective after an hour and a half. It lasts for a maximum of 4 hours and then the temperature returns. We were at the pediatrician on Monday, they prescribed antibiotics. We have been taking them for two days now. At night, paracetamol doesn't work well, ibuprofen doesn't work either. What else can we alternate with paracetamol? I can't sleep at all at night anymore.