Girls, the baby is sick at 5 months old, temperature 38.5, throat red,…

Girls, the baby is sick at 5 months old, temperature 38.5, throat red, we went to the doctor today, said don't do anything, just dissolve half a tablet in boiled water and soak the pacifier in it, I also give him ibuprofen, lowers the fever but after some time it rises again, I'm already panicking, can't call an ambulance because they will take him to the infectious ward, and I have another child at home, nobody to sit with him, how did it go by quickly?