I'm a diver and twenty I landed really hard in the water off a 3m board on the side of my face. immediately at impact I could hear ringing and my hearing was blocked. it sounded as if you but a seashell on top of your ear ad the hearing was just muffled. I can still hear by It isn't as good as my other ear, everyone said it was just eternal but after one night of sleeping on one side is still there. any clue on what it is? and if it's serious?