Child constipation

Hi,

My 5 year-old daughter has suffered from digestive issues since birth. She suffered of wind/colic for a long time but was only treated for constipation. She took movicol for a long time but it did not solve the issue, made her wind worse. She has and has always had a poor appetite. Burps quite a lot. Sometimes is deep breathing after a meal. When she stops to eat she says it's because her tummy hurts or is full. She is moody most of the time but especially in the morning. She strains on the toilet whether the stool is hard or soft. Complains of a sore leg (left side) and sometimes stomach pain to the left. She is tired in general. Not much wind downwards except if she eats cabbage/beans etc...
Have been giving her alumina for over a week three times a day and I must say it has helped a lot (with tiredness and appetite) but issue not completely resolved. Still shortness of breath after some meals (mainly dinner) and although she is not straining as much, not evacuating completely.
Thanks for your advice.