Thanks to HCM I can understand your concern I would like to know does you have any burning sensation in urine or not but presence of pus cell not only indicate the infection ,even without pus cells also there may be infection so I would like to suggest you undergo once culture of urine as well as blood which shows the causative organism of fever vertigo on and off due to either electrolyte imbance or generalized weakness plz one more time under go ultrasonography abdomen to know much details of post appendicectomy routine investigations also need like cbp. esr , fever profile like widal, malaria and chest x ray don t worry plz drink plenty of water or liquids . take zenflox uti for 5 days till result waited it will subside .ok