Objecting to a judges ruling

My wife and I disagree on having our boys circumcised. When I was out of the country for a funeral, she went ahead and had one of my boys circumcised without my knowledge. Because we were going through a divorce, I had filed a motion with the court to try and prevent her from doing this to my other son who is eight. The judge ruled that any non emergency/cosmetic procedures should be agreed upon by both parents in order to proceed. When we went before the same judge for our final divorce hearing, she brought it up again, and this time he said that since she now has majority time share with the kids, she has the final say in the matter. As the kids dad, and primary care giver over the years, I am outraged by this decision as I feel I am equally their parent and should have equal say. How can I overturn this decision? I went through mediation and the divorce proceedings without a lawyer