Fever & Cough with cold. Should we do?

On evening of 10th August my son got fever with headache so we gave him Paracetamol but after 6-7 hours he was again suffered with fever so we take him to a pediatrician & he asked for some lab tests & found CRP was increased up to 15 so he diagnosed with antibiotics & some other supportive medicines.after that he was on improving phase without any fever but after 3rd day he got dry cough,cold & fever so we take him again to the doctor & he again diagnosed with same antibiotics with some other change medies for next 4 days & instruct us for fever recording for next 3 days.. After this consultation 1 day has been already gone & frequently fever coming in morning & evening time upto 101 F with ...So please suggest us what should we do