I got a powerful slap on my left cheek together with my left ear. I heard a noise at that time and from then onwards I feel like an air-block in my left ear. It has been 3 days. I can only go to the hospital in 2days time. Im not having any pain so far but just feeling like air-block in my left ear and so the hearing is not as per normal. What should I do? Im quite worried about it...