As the ENT surgeon I can guide you on this when the cough is not control even after taking many cups enough and allergic medication for a long time the most common cause of cough is the laryngitis which can be easily managed with some lifestyle modification and supplemented by medications. ur symptoms are more in line of allergy Do you had any history of frequent episodes of acute gastritis or severe burning sensation in throat or recent change in your voice

Get test for tb if negative . Consult with physician from