What Causes Acid Reflux Along With Abdominal Cramps?

I made a drink for myself with Greek Yogurt, frozen blueberries, some milk and honey to sweeten the drink, every since 2 days I am having lots of gas and cramps in my stomach, I do not have loose bowels, am going to the bathroom regularly. This has happened many years about ( 5 yrs ) I am 87 , very active only pills Imtake beside vitamins is baby aspirin and prednisone for the pains in the calls of my legs and AML odipine bednaz 2.5/10 mg caps, go ballroom dancing almost every day. How s that? Ty