Hello and hope you are doing well.
Your symptoms could be due to a sinus infection, a cold or a chronic allergy. It can lead to a post nasal drip and lead to an irritation in the throat. It could be sinusitis, if it is accompanied by nasal stuffiness and facial pain or pressure. Post nasal drip could also be due to allergens. You will need to consult your primary care physician for proper assessment. In the meantime practice good breathing exercises, humidify your room and do steam inhalations.
Hope this helped and do keep us posted.