I was perfectly fine, standing upright, then all of a sudden I heard a "whooshing" sound going from left to right and my left ear was stuffed with intense tinnitus. Over the next couple of hours the tinnitus lessened and ear felt unstuffed. However, a day or two later I got the flu (or something like it) for a week which led to sinusitis. I now have constant tinnitus in my left ear. It seems to get worse temporarily when laying down. Also ears get easily stuffed when blowing my nose. Saw an ENT and ear looks normal from the outside. Any thoughts on what could be going on? It has been 3 weeks now.