Try codeine containing cough syrup, like corex, but stay cautious not to take in too much, as it causes sedation. And get a tuberculosis test done, just to be on the safer side.

Hello there. You might be allergic to something which can be causing this problem. Do you have any sort of soreness in your throat? Drink Luke warm water, you can take a syrup dextromethorphan and CPM combination syrup 5nl thrice a day for 5 days. If it still doesn't subside, consult a physician in person. After taking the syrup you may feel a bit drowsy so advice you to not drive. Regards