It sounds like you are going through a case of sinusitis, an inflammation of sinuses ans nasal passages.
Nasal congestion with thick secretion, headache, facial pain upon pressure in the area of cheeks, nose and eyes, sore throat, cough, sometimes fever, fatigue, are all symptoms of this condition.
Sinusitis, usually, follows a case of viral infection of upper airways, or allergy attack.
Fungi, or air pollutions, can trigger the same problem.
Some structural nasal problems, like nasal septum deviation, or presence of nasal and sinus benign growths (polyps), put the patient at greater risk for frequent attacks of sinusitis.
Accumulation of excessive nasal secretions or mucus drainage in the throat or back of the nose is known as post nasal drip, leading to bed breath, need for constant throat clearing, tickling in the throat, swallowing and spitting mucus constantly.
It is very characteristic finding in sinusitis sufferers.
Every person, should visit a doctor when experiencing pain or pressure in the upper face accompanied by nasal congestion or discharge, postnasal drip, or ongoing bad breath, for appropriate drug treatment.
Sinusitis left untreated increases the chances for chronic sinusitis attacks later in life.
Best wishes!
Marija