My sister has fever from afternoon around 4pm till early morning and normal till afternoon. We consulted a physician and we took tests: cbc, esr, covid, widal test, complete urine exam, dengue, thyphi dot, malaria rapid antigen test were all negative and normal. However CRP serum was 27.6. lymph node behind ear was slightly swollen. After 3 days of medication, the doctor has given 5 more days of antibiotics. Initially fever was around 100F and now its around 100-102F. She took CEFTAS the first time and CEPODEM xp now. She got similar kind of fever few years back when all tests were normal but took malaria medication it subsided miraculously for us..Kindly suggest us what to do?? Thanks!!