Thank you all for the replies. It's nice to know we're not alone. She had a week were it was happening every send day if not everyday and we thought great we're turning a corner!!!
Nope back to normal now. It's been 5 days since the last bowl movement. I've sat her on the toilet everyday for at least 30 min and when she's doing her little holding in dance and nothing!!!! I think o will take your advice and see a gastro as the movicol does nothing and I want to treat this but want to do it with the guidance of a professional instead of dosing her myself!
I really need to incorporate more veggies as a fussy 3yr she hates them!!