yes, swallowing air will cause belching. But the real reason for the belching is because you are releasing hydrogen from foods that you are not digesting properly, moreso, the bacteria are the ones that are releasing hydrogen thus you need to expell that gas so you belch. Let me guess, do you often have dry mouth? Do you often get a whitish tongue or feel like there is a bad poop taste on the back of your tongue? Do you get tonsil stones? If so, i would recommend a toothpaste like biotene, and biotene mouthwash for proper oral hygiene (very gentle so your mouth doesn't get so dried out). ALso, buy a waterpik from bed bath and beyond and flush tonsils once in AM and once in PM if you get tonsil stones or the bad poop taste on the back of your tongue. THat's for the oral care. For the stomach, what PPI are you taking? How long have you been on it? Do you take a probiotic? WHat type diet do you eat? Anything that ends with an -ose with make you belch, such as beer (maltose). So what your body is telling you is that you need a diet change. No gum, no mints, no soda. Avoid alcohol. No fried fatty foods. No foods with high fructose corn syryp or high maltose syryp. So basically, start eating a lot of vegetables, like 2 servings fruit per day (that would be one banana and 5 strawberries). See if cutting out dairy will help, or, maybe just cutting out lactose but still having dairy if they just use casein instead. Bread, buy a bread without HFCS in it and choose a bread lowest in sugar. Replace butter with extra virgin olive oil. Meat-bake lean chicken or fish. So the goal is to eat healthy and provide nutrition to yourself but starve the bacteria of what they like to eat, which is sugar, so if you dont feed them then they cant release gas which you have to expel either by belching or farting it out. Also, bacteria is really important, it is called flora, it helps to control hormones and digestive processes, it basically dictates all our body systems, so that is why it is so important to keep it in balance (homeostatic).