well one thing comes to mind, how did she get to make the decision to take your son away from you?
Have you spoken to a lawyer concerning this?
Just taking him and establishing full custody like that without even considering when you get to see him and for how long you get to see him seems a little presumptuous.
Do you have him half the time at least?
When do you see him?
Do you get to keep him for several days - do you guys swap having the kid?