Hi
My feelings of the honeymoon period were of thinking I had it all sussed out not long after diagnoses and then having the rug pulled out from under me and losing control for no obvious reason. The reason of course being the honeymoon effect. You are at sea for a while, it isn't a pleaseant time. I never stopped taking insulin though; my daibetic nurse was very clear on this. Maybe it's different for children, I don't know as I was 30. Keep testing a lot, and after a few months things should settle down for him.
Tough time for you and your son, but it will get easier. Good luck.