Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain it seems that you are suffering from upper respiratory tract infection, also known as Common Cold and the symptoms of bad cold, nasal congestion, sore throat and post nasal drip seems to be due to it.. As cold has subsided but if still you have sore throat it can be due to secondary bacterial infection.. As of now you can start with supportive treatment to relieve the symptoms like: -Gargle with a warm saline solution that is by mixing 1 teaspoon salt in a glass of water and warm it to make a luke warm solution.. -Take a combination of decongestant like Phenylephrine, mucolytic like Ambroxol and anti allergic levocetrizine and another combination of Acetaminophen and Ibuprofen.. -Take cough expectorant containing Gueifenesin and cough suppressant containing Dextromethorphan. -Chew a Vitamin C pellet daily.. -Do steam inhalations.. -Avoid spicy and chilled foods.. -Sip on warm water throughout the day.. -Do warm compresses over chest.. Hopefully the symptoms will resolve within a week and if it worsen consult a General Physician and get evaluated and a throat swab culture and complete blood picture can help in diagnosis and treatment can be done accordingly.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.