Thanks for posting your query.
Do you have fever/ chest pain/ breathlessness?
There may be possibilities of upper respiratory tract
infection or cough variant asthma
You should consult with internal medicine specialist and should go for thorough check up.
You should go for chest x ray, complete hemogram and ESR.
Cough may also be due to gastro-esophageal reflux disease.
You should continue prilosec
and also take cough suppressants.
You should also go for endoscopy
You should also perform gargles three times in a day.
Dr. Mayank Bhargava