It sounds like you might be experiencing a common viral infection, like a mild cold. Please don't worry, as these symptoms usually resolve with simple self-care. To manage the mild fever and body weakness, you can take paracetamol as directed on the package. For your itchy throat, warm salt-water gargles or generic throat lozenges can provide quick relief. Most importantly, prioritize plenty of rest and stay well-hydrated with water or warm fluids. If your fever persists for more than three days, or if your symptoms worsen, please consult a doctor in person for a proper evaluation.