A fever of 102.6 F that keeps coming back every 4 hours on the first day or two is very typical of a viral fever, and it is normal for paracetamol to bring it down only for a few hours - that does not mean the medicine has failed. Please continue paracetamol 650 mg every 6 hours (maximum 4 doses in 24 hours), and in between do tepid sponging with normal room-temperature water on the forehead, neck, armpits and groin, which brings the temperature down faster than any tablet. Give plenty of fluids - water, ORS, coconut water, soups, thin dal - and light food and rest. Please do not add any antibiotic on your own and avoid ibuprofen or combination painkillers until dengue is ruled out, as they can worsen bleeding. Since it is now the second day, if fever continues beyond 48-72 hours, get a CBC with platelet count, dengue NS1 and IgM, malaria smear or rapid test, urine routine and a
CRP done, and see a doctor with the reports - in Delhi at this time dengue and typhoid both need to be excluded. Please take her to a hospital immediately if she has breathlessness, chest pain, persistent vomiting, severe abdominal pain, bleeding from gums or nose, red spots on skin, black stools, very little urine, drowsiness, confusion, seizures, cold clammy hands or a fever above 104 F not responding at all. You are welcome to consult me on Practo for follow-up, or bring her to Synergy Multispeciality Hospital, Miraj if you are nearby.