How to decrease CRP. We consult!

I have 9 months old baby boy.he suffered 20 days back fever on and off.we consult doctor.he suggested antibiotic.we used 5 days.after one week again he suffered with fever nothing but only head is heat(99 to 100) body is cool.in Hyderabad we consult rainbow hospital pediatrician.thier did blood test CRP level 69.doctor suggest admit in hospital given treatment IV injections 2 days in hospital.after blood test CRP is 54 they discharge.they gave iv 3 days from home after 5days flowup blood test CRP increased 74 and ESR 103.once again we Admitted in hospital 3 days  again gave iv injections CRP is 45 and ESR is 65 in that 3 days doctor did all types of tests ( 2d eco, abdomen, TMS, fluoroscopy, xeray, sonography,all types of blood tests, urine tests.uric acid, urine for organic test,eye test,skin test all tests are normal.when we admitted onwards no fever, baby is active, feeding good,no other issues,but we are not finding why CRP level not decrease what we do what pediatrician we consult