For a 6-day cough and throat irritation, you can try over-the-counter remedies. For a dry cough, a suppressant containing dextromethorphan can help, while throat lozenges or anesthetic sprays soothe irritation. If you are coughing up phlegm, an expectorant like guaifenesin helps clear mucus. You can also take ibuprofen or acetaminophen to relieve throat discomfort. Stay well-hydrated with warm fluids like tea with honey. Since your symptoms have lasted nearly a week, please see a doctor if they do not improve in the next few days, or if you develop warning signs like a high fever, shortness of breath, or chest pain. Avoid taking antibiotics without a doctor's prescription.

Since your symptoms started last night, this is likely a common viral infection. For your hoarse voice, the best treatment is strict voice rest, staying well-hydrated with warm fluids, and using steam inhalation. Avoid whispering, as it strains your vocal cords. For pain or a sore throat, paracetamol or ibuprofen can help. If you have a dry cough, a cough suppressant like dextromethorphan may offer relief; for a wet cough, an expectorant like guaifenesin is suitable. These symptoms usually resolve with rest. However, please consult a doctor if you experience high fever, difficulty breathing, or if symptoms persist beyond a week.