Hi welcome to HCM... Here you are having chest congestion . The cause mostly will be URTI or bronchitis .... Investigate with CBC first ..... If lymphocytosis - viral infection If eosinophilia - allergic infection If neutrophilia - bacterial infection Here allergic infection seems most likely ... For which Allegra M like antiallergic drug needed as this is since long time ... Steam inhalation will be helpful in relieving congestion ... If bacterial infection antibiotic like levofloxacin given for its full course ... Take one tsp ginger juice with one tsp honey for few days .... If still not improving investigate with chest x ray.... Hope your concern solved .. Here although I am giving best answer but examination will be helpful like auscultation....so consult pulmonologist for your case and discuss these knowledge with him for further correspondence ..... Wish you good health....