So my little boy is 7 weeks old. & he's on formula.. cow&gate, he was ok on it at first but then he was constantly hungry.. I upped the oz, but he would still wake up and want more. So I changed his milk over to hungrier baby. It worked brill. But the last Few days he's been so unsettled and clingy. Constantly crying, & its down to tummy ache, after he's managed to go for a poo he's fine for a while, so last night I changed his milk back over to the normal cow & gate, im gonna leave him on this one but I don't want him getting constipated. Do you think I should leave him on this milk or speak to my midwife to see what is best for him?