I burb a lot and tend to always have gas. It's been going on for about a year. What is it?

Burping and gas. Air in the digestive tract may come from a variety of sources-maldigestion due to enzyme deficiency (ex. Lactose intolerance) or food intolerance (ex. Gluten sensitivity), fermentation by gut bacteria (as with bacterial overgrowth syndrome or changed flora after antibiotics), altered GI tract motility, excessive air swallowing, as well as inflammatory and infectious causes. Easy to test for these.