Mucus keeps on getting produced and drained, if mucus is not going down then there should be a problem in eating and drinking also, which is not there in your case... Dryness of the throat must be causing you these symptoms.Usually due to pharyngitis. (Dryness)
Next Steps
Consult properly,drink adequate water.
Health Tips
Pls consult in person first. to know exact cause of throat dryness.