Hi welcome to health care magic.... You have taken six month full course of AKT.... So chance of reccurent tuberculosis us less.... But if resistant bacilli there than chance can be... For which repeat sputum examination and chest x ray needed..... Fever also can be from other cause like gastrtits, inflammation, infection anyware like gall bladder and liver infection etc... For that physical examination done to look for tenderness anyware in abdomen and if needed CBC and USG done... Meanwhile for fever you can take paracetamol tablet... Than if specific cause found treatment done accordingly... Take care. Advise : physician consultation for further examination.