I woke up with my ears feeling full and my hearing was muffled. what is wrong with me?

Ears full: The most common cause of insidious onset of ear fullness with decreased hearing is congestion in your eustachian tube, usually due either to chronic allergies or to a recent cold. There are no really good treatments for this, and generally you just have to wait it out. This condition is usually associated with a feel of pressure, but only in severe cases is their actual ear pain.