Do you hear ringing in ears? Do you have any past medical illness?
Do you have cold symptoms? Age and sex?
Any other symptoms?
Heavy or feeling of fullness in ear is due to viral throat infection. You should use Otrivin nasal drops 2 drops three times daily in both nostrils, it is otc .Take Plenty of fluids.Also buy Menthol salts they are available OTC and use them in form of Menthol steam inhalation , they will be very helpful. If you have headache , then take Motrin . it may take 5-7 days for symptoms to get resolve. Ear symptoms , will disappear in 5 -7 days. this is not a serious disease.