Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain persistent cough along with throat tightness and need to clear the throat can be due to a number of causes like Upper respiratory tract infection, sinus infection, post nasal drip, acid reflux,bronchitis, side effects of medications, allergies etc.. I would suggest you to consult an Otolaryngologist and get evaluated and a thorough clinical evaluation and investigations like throat swab culture, nasal endoscopy, chest x ray, allergic test as per suspected cause can help in diagnosis and treatment can be advised according to the cause.. As of now you can start taking anti allergics like Levocetrizine and cough suppressants like extromethorphan.. Take mucolytics like Ambroxol.. Avoid spicy and chilled foods.. Do steam inhalations and suck throat lozenges. Sip on plenty of warm water. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.