Hi thanks for contacting HCM.... Here you can have viral infection associated that leading excess mucus production and post nasal drip.... So you are feeling discomfort and difficult swallowing.... For congestion yo can take antihistaminic drug... Also examine posterior pharynx and tonsil . If inflammatory swelling more steroid can be given for short course..... Salt water gargles done. Drink more hot water ... Excess spicy and fried food that aggravate phlegm avoided.... If needed mucolytic drug like ambroxol can be given... Hope your concern solved. Take care. Consult physician with keeping my answer in mind.