His last HA1C came out to be 9.7 which terrified me a lot. He weighs 26 kgs and measures 134 cm in height. Although your son's A1C could be improved, it is certainly not a result to be terrified about. Your anxiety is natural. I have rarely met a parent of a child with diabetes who did not want really low A1C readings.
Stress elevates blood sugars in people.
At age 7, I expect your son's blood sugars may bounce around as a result of the stress of growing and changing. That is natural. Puberty will be yet another time of great change for him. In general, he is going to pick up the attitude of those around him. If you acknowledge that there is room to improve and do all you can, then he will probably reflect that view.