My 6-week old baby is straining a lot to a point that he cries – and usually poop doesn’t even result. However, it is not constipation as he poops regularly once a day and the stool is normal. I will be visiting the doctor soon but any suggestions? I have changed formula a few times – all milk-based. Should I try a another different brand? Could a soy formula help? Is he possibly allergic to the milk-based? He has regular spit up – no vomiting. Straining appears more often than not.