Oo, naranasan ko yan din with my LO! Usually it's just gas or normal digestive sounds, ang tiyan ng babies ay laging may weird noises habang nag-digest sila ng milk or food, kaya walang alalahanin. But if kasama nito ang constant crying, fever, or parang uncomfortable siya talaga, best to check with your pedia para mapakali ang iyong isip, minsan it could be something minor lang, pero mas okay na i-confirm.