Hi, it may not be related the lightheadedness and burping. The light headedness may happen if there is inadequate supply of oxygen to the brain. This can happen with cardiac disorders or lung disorders. In cardiac disorders there is inadequate pumping of blood and in lung disorders there is inadequate oxygenation. Symptoms are usually aggravated with exercise in cardiac disorders. Diabetes mellitus and hypertension can cause these symptoms. Again inadequate sleep, hypoglycemia, anemia and vitamin deficiencies can aggravate your symptoms of lightheadedness. You will need to consult your primary care physician for a proper evaluation. Regards.