Could this be a lactose intolerance?
My baby has gone through phases of acting like he has tummy pains. I would say this happens maybe once or twice a month. He crunches up and cries and screams and can't be soothed. I can't pinpoint any particular food that he has had that could have triggered it and as it was happening before he started eating solids I can only assume it could be his milk. Is it possible that when he has days when he drinks more milk than usual or has extra cheese or yogurt that this is causing him pain? The doctor wasn't very helpful and didn't take me very seriously and just said as it's not a constant it's hard to say. Also just to add his poos don't change during this time.
Any ideas?