Hi welcome to Health care magic forum. According to your description it appears that the
cough is the upper
respiratory tract infection, probably caused by
allergy or infection, or both. Or it may be
tuberculosis infection some times we may miss it in xray and sputum test also.
Chronic
upper respiratory infection causes, uvulitis a prjection hanging from posterior part of
hard palate. Due to infection it increases in size and touches the back of tongue causing continuous irritation of that part and produce cough . After a lapse of few days it becomes stubbern due to more fluid in it and difficult to treat. In that case it may be necessory to cut
uvula for relief.
I advise you to consult an E.N.T,surgeon for diagnosis and treatment.
I also advise you some diet recommendations as avoid taking more of fruits, juices, ice cream, ice water to avoid allergy and to prevent exacerbation of the symptoms, till you get complete relief pf cough then you can take all these foods.
Wishing for a quick recovery from the cough and vomitings and thanks for calling.