Welcome to H.C.M
With little information and as per the history you have given and the clinical findings you may be suffering with chronic pharyngitis
. usual presenting symptoms are foreign body sensation/sticky sensation/ or somthing dripping in oral cavity behind the nose. you have been provisinally diagnosed correct. I usually prescribe my patients with oral antibiotic along with antihistaminics for one week and nasal steroidal spray for atleast one month.
But still I would suggest you to consult the Specialist if you don’t get relief as on examination the findings may be different and line of treatment may have to be changed. Please don’t hesitate to consult and ask for any more query. i will be pleased to answer.
With best wishes for a speedy cure
The Health Caremagic Medical Team