Baby fever. Days?. is it normal or not?

Dear Dr, My son is having fever last three days and I have visited primary health centre at my hometown. They prescribed two syrup and it is paracetamol pediatric syrup and trimethoprim & sulphamethoxazole oral suspension IP. We are giving only paracetamol as per refered by practo doctor 4ml/4hrs. My son is 7month, 15days old and 6.75kg and he is not having any rashes, no vomiting and cold but sometimes Cough ( not regularly). We are following the same homemade food since a month and we haven't changed anything + mother's milk during the fever also. Baby is active both fever and non fever time and taking food as well. We are trying to give more water as much possible. Baby is passing urine as usual. I am not sure why fever is not reducing since these many days?. Do I need to change the medicine by consulting Dr. I have monitor the temperature at armpit and attached for your reference. Is it normal or not? Please help me doctors. Thanks Venu