Hi I am 24 years old and this has been happening alot recently

When I wake up my left ear is always plugged up. It is so plugged up that I cannot hear anything out of that ear. It will unplug eventually but it takes between 10 mins - 6 hours to do so.

I do sleep on my left side so I tried sleeping in another position and it still happens.

I went to one doctor and he said there is nothing wrong.

Hi there. Have you noticed a change in that you prefer one ear over the other when talking on the phone?

You need to see an ENT. I would definately get a MRI. How long have you had these symptoms? I'd also get a hearing test! I have that feeling that you describe now, and it is because of a tumor in my inner ear. I just had my MRI this week, and found out I have an inner ear tumor. Not to worry you, as these tumors are benign, and are treatable. You just can't leave them alone however, because they can cause problems. Don't ignore subtle symptoms.