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 coughing, choking with phlegm, sinus congestion and runny nose are all due to cold.. It does not seems to be bronchitis and is probably due cold and sinus infection.. I would suggest you to consult an Otolaryngologist and get evaluated and a thorough clinical evaluation and investigations like PNS view x ray or MRI scan can help in diagnosis and treatment can be done accordingly.. -You can be advised a course of antibiotics, anti-inflammatory painkiller like Ibuprofen, decongestants like Pseudoephadrine, do saline nasal irrigation, steam inhalation and use a humidifier in your room.. -You can also be advised decongestant nasal sprays containing Xylometazoline or Oxymetazoline.. -Avoid spicy and chilled foods.. -Do warm compresses around nostrils.. -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 mucolytic like Ambroxol and anti allergic levocetrizine and another combination of Acetaminophen and Ibuprofen.. -Sip on warm water throughout the day.. Hopefully the symptoms will resolve within a week and if it worsen consult a General Physician and get evaluated.. Hope this helps.. Thanks and regards.