It seems from the history that you are having constant throat clearing with nasal drip.
This is usually caused by chronic pharyngitis
or chronic laryngitis
or chronic sinusitis
. This is not caused by acid reflux
The treatment of the condition is by use of antibiotics and decongestant drugs.
Salt water gargling and use of lozenges will provide symptomatic relief.
Hence I advice you to consult your ENT doctor for examination and treatment accordingly.