Cold with sore throat, coughing, & nasal congestion for 3 days. I blew my nose & my ear now starts popping whenever I swallow. Will the popping stop?

Viral URI. 3 days of symptoms sounds like a "cold." There is fluid in the eustachian tube due to the nasal congestion and increased mucus. This will likely resolve when the cold resolves but can linger for a couple of weeks afterwards due to residual inflammation.