Hi there.. Cold is usually associated with headache weakness fever.. during cold you lose electrolytes in nasal discharge and if you don't hydrate yourself well then you will have weakness giddiness. Do steam inhalation thrice daily, take tablet containing chlorpheniramine+ paracetamol+ caffeine... have fruits rich in vitamin C.(vitamin c is shown to be effective in relieving symptoms of cold).. for nausea and vomiting take tablet pantoprazole+ domperidone(before food twice daily), have bland food, avoid spicy, have oral rehydration solution.. drink plenty of fluids..