Are you having any active common cold? Your nose is stuffy? If no, then you can do Valsalva Maneuver to open blocked ears. Remember you should NOT be having any common cold when you do Valsalva maneuver. That's the exercise to open blocked ears.
Feeling heavy in ears, ear block are symptoms of Eustachian tube block (tube connecting middle ear cavity to nasal cavity)
Next Steps
in person consultation required, for further advise.
Health Tips
avoid blowing of nose hardly, do act of swallowing, consult ENT specialist in person to get diagnosed properly