Back in March, I was treated for a sinus infection, but had 'fullness' in my left ear. I had my ear syringed in case of earwax buildup, but it didn't help. Started feeling mildly nauseated and off-balance, light-headed, and foggy in April. Tinnitus at bedtime, when everything was quiet. I also felt my left ear 'draining' at times, like there was water in my ear, but there was no fluid in my ear. Exercise, even taking a walk, made me feel sick.