You are having a chest infection
which could be pneumonia
, pleuropneumonia, and other atypical germ chest infection. So, i will suggest you visit a doctor right away for evaluation and to run laboratory exams + chest x-ray to able to determine what type of affection you are presenting with.
Non-the-less you could start by taking a cough syrup like carbocysteine or mucomyst
or bronchathiol syrup etc. Also appropriate antibiotics and steroid could alleviate the problem. But i suggest you see your doctor for proper prescription after physical evaluation.
Best regards and hope this helps