Hi. I have a week long problem with my left ear. It started all of a sudden - I can't hear well and sound echo like I'm in water. I first thought maybe I got water in during a shower, but it feels different from that. It's been 9 days since I first noticed - no pain, no noticeable difference on surface, I'm healthy otherwise, I don't smoke and am fit (go for 3km run everyday). Any suggestion would be greatly appreciated. Aska