I am suffering from cough for 2 months, also seen two doctors with one doctor i got some relief but the cough is not ending completely, she told me that i am having allergic cough, my cough gets bad when it's night or when my throat gets dried either by laughing or through dust and smoke, as the cough is from log time i am little worried that it may not lead to tuberculosis so want suggestion what should i do and have checked online for sputum test which showed a list of those test but don't know which sputum test should i opt for to confirm that what it is ?  please help Also want to mention this cough started after my trip to manali