It is likely that you are developing a sinus infection, and possibly ear as well.
Nasal congestion/allergies cause swelling on inside of nose which obstructs the sinuses and may result in sinus infection (sinusitis
). Also, some postnasal dip occurs commonly and cause itchy throat sensations etc...I would consult doc for eval.
In the mean time, some otc cold/allergies meds may help..