Girls, who have encountered constipation in my child since 3 months ol…

Girls, who have encountered constipation in my child since 3 months old... were seen by a doctor, said the gallbladder duct is curved, without microlax, doesn't poop, sometimes he poops himself, but mostly cases use microlax, they prescribed a diet, I tried everything, apples, plums, but there's no result... we also have an allergy to milk and fish... it happened up to 10 days earlier, didn't poop, but now I started to more seriously monitor until 4 days, I wait for microlax enema, I do it, wanted to know, can someone have experienced something like this and can microlax be applied so often?