Tickly cough and swallowing difficultly.

(Tickly cough, throat itching, needs frequent throat clearing, uncomfortable while swallowing feels like something is stucked like thick phelgm, nasal congestion always wen i wake up in the morning one nostril will be blocked all the times).. 2 months back i had fever and had all symptoms of covid like fever, cough, loss of smell, loss of taste etc consulted doctor that time and got it treated on time but still tickly cough is present and only 50% of sense smell has come.. Sense of taste came back fully.. Consulted doctor completed the course of antibiotics - and montelukast for two weeks.. Even after the course is completed still continues  the tickly cough and all symptoms mentioned in first line in bracket.. plz reply may god bless u all