Your kidney is having a hard time neutralizing the acid in your blood and or passing up the opportunity to neutralize your stomach content too. Here is what I would do. I grab a glass and put about a mouthful of water or two. Add 1/2 tap of baking soda, swish and down followed immediately with a mouthful or two of cold water to rinse because it tastes bad. I will belch and feel better in no time as it works immediately. Having too much makes your skin itchy after a bit because it will leach through your pours but if you don’t have too much you will be perfectly safe. What you are eating is causing the acidity. Avoid eating carbs and fat at the same time.