Any idea why I feel bloated and burp a lot during the day?

It's probably the type of food you are eating. Legumes may make you feel that way. There's not a definite answer.

Grains will make you feel that way too, many people who do not have celiac disease have gluten intolerances (myself being one of them). They make your body inflammed and cause all times of gastrointestinal discomfort. Try eliminating grains for two weeks, and instead get your carbs from vegetable sources like sweet potatos. This has helped me tremendously.