Thanks for your query and my aplogy for not responding it earlier. Though it is very late I hope the fever
must have settled down by now. In case the fever is persisting kindly consult the doctors who shall try to find a cause for it. May be they may do some investigations to find a cause.
Antibiotics are given routinely after surgery and once there is no sign of infection it is withdrawn.
I hope I have answered your query to your satisfaction.