My baby is 3 weeks old and has been drinking cow and gate since birth but since week 2 hes very constipated. Doctors prescribed lactulose and i gave him a few times but don't want my baby to depend on it. Hes does poo every 2 days but since the last two days hes had a more upset stomach and you can tell hes in pain. I have a appointment with the HW in a couple of days but wanted your advice aswell. I don't know if i should switch to another brand milk or use cow and gate comfort. I have got gripe water and infacol but not sure what to do.