These symptoms are very common with viral colds and typically resolve with self-care. For the mild fever and weakness, you can take Paracetamol to help lower your temperature and relieve body aches. For the cold, an antihistamine like Cetirizine can ease nasal congestion. If you have a dry cough, a generic cough suppressant containing dextromethorphan may help. Most importantly, get plenty of rest and drink warm fluids to stay hydrated. If your fever spikes high, you experience shortness of breath, or symptoms don't improve in a few days, please consult a doctor in person for a proper evaluation.