For your symptoms, over-the-counter medications can provide effective relief. You can take paracetamol or ibuprofen to help with weakness, body aches, and sore throat pain. For your blocked nose, a saline nasal spray or an OTC decongestant (like pseudoephedrine or a short-term oxymetazoline nasal spray for maximum 3-5 days) will help. Use throat lozenges and do warm saline gargles to soothe your throat. Get plenty of rest and stay hydrated with warm fluids. Since these symptoms are typically viral, antibiotics will not help. If you develop a high fever, difficulty breathing, or symptoms last over 10 days, please see a doctor.