Thanks for putting your querry on HCM
You Need not worry too much . It appears that your child is suffering fron viral fever
. Please note that fever is body's defense mechanism. it will take time for the fever to subside.
Usually no antibiotic is prescribed in viral fevers only symptomatic treatment is given. If you have started antibiotic you should have it for atleast 5 days as it takes 72 hrs or 3 days to reach its optimum affect ie MIC.
Jumping from one antibiotic to another would result in resistance to the antibiotics , which means you will have to use stronger antibiotics ,which we dont want.
I would recomend you to talk to your doctor and start with lower or appropriate antibiotic.
Last but not least have some patience and give time to the medicine for it to work.