I am having sinus problems. About 2-3 weeks ago, I had some issues with my sinuses (congestion, sinus pressure, fullness to the left ear, coughing, sneezing). I got off work on Wednesday with no sinus issues. When I woke up, my nose was stopped up on one side. It gradually became congested in both nares. I also began to have fullness in my left ear. It seems that every time that I have issues with my sinuses, I get fluid behind my left ear only. Should I be evaluated by an ENT physician? And also, could this be allergy related?