What causes a fluttering sensation in the lower abdomen? it's happened about 5 times in the last 2 days. doesn't feel like gas?

Gas /Air/Peristalsis: Fluttering "gas" may reflect malabsorption of food (like gluten, lactose), intake of poorly digested food, or choosing foods known to promote gas (beans, fizzy drinks). Sometimes its more complicated--a stomach emptying too slowly, bacterial overgrowth syndrome, delayed intestinal function, partial obstruction from any cause, infection, rectum problems, and pelvic pathology outside the gut.