I think my heart stopped beating when i was walking cuz i felt a huge pressure in my body and ears?

People that describe chest pain as grabbing are most likely to have episodes of angina... It might not be that but you should visit a cardiologist (a good one) and get an ultrasound or whatever he suggests (even a coronary scan). In any case DON'T neglect this fact. My father was 49, was under a lot of stress and wouldn't go to the doctor but kept taking aspirins that eased that grabbing. He ended up with a heart attack and a cardiac arrest. He is on medication now, but in a not so good condition. It doesn't depend on your age. Go to the doctor and find out. Even if it was angina you can deal with it without pain and discomfort. I hope it's not (and might not be, the ear thing might indicate something else). Take care :)

Ask you cardiologist about PVC's. He may suggest wearing a 24 hour Holter monitor. Reducing beer and stress would help.