Hi Nita
Sorry, no advice, just empathy. I have a rebellious 17 year old son, diagnosed 16 months ago. He complied beautifully for 6 months, got HbA1c down from 15.8% at diagnosis to 6.1% 6 months later. In September it had crept up to 9.1% but since December he has been in double figures.
Is your daughter on MDI? Does she 'deal with it' at school? It turned out my son suddenly felt very uncomfortable testing and injecting at school as he moved to 6th form with a new bunch of friends who didn't know about his diagnosis, so suddenly went into denial about it all.
His team came up with a solution, which though not perfect, seems to be helping a bit. He used to be on Novorapid with all meals and Lantus at bedtime. He started skipping lunchtime doses. Once he skipped one dose, it seemed to him not to be a problem to skip another too, hence the high HbA1c. What his team suggested was putting him on a mixed insulin (Humilin M3) at breakfast time to cover him whilst at school, then back to the Novorapid with evening meals/snacks and Lantus still at bedtime.
It's not perfect, they had to stab in the dark with dose levels to begin with, and have now upped it a bit, so hopefully we see positive improvements at his next clinic appointment in May, but I feel things are a bit better than they were.
He won't test though, he goes weeks and weeks without testing. Even when hypo he says he knows he is hypo, so doesn't need to test to confirm it, just treats it! He too has a very sweet tooth (and a weight problem) and as he earns his own money from a weekend job now, I feel powerless to stop him buying bars of chocolates and sweets and eating them in one go, mid evening.
Just like you, any mention of anything diabetes/diet related, and he goes off on one at me. No magic answers I'm afraid. I really have backed off lately, going days without mentioning anything, but only last night he mentioned feeling sick as he had been given an Easter egg at work and came home and scoffed the lot. Of course I mentioned he shouldn't have eaten it all, and certainly needed to inject for it, and off he went at me. What can I do? I don't have a clue. He won't consider online forums or facebook pages or anything. To him, I think that would just be a step too far in accepting he has the condition. I really fear for his long term health given his denial, but feel powerless to do anything about it.
We see his DSN in about 10 days just for a chat, but that's all that will be, no blood tests, so won't really know how it's truly going, and of course he will say just what they want to hear. He will admit to not testing, but when they suggest he does at least a couple of times a day he will agree to, but won't.
So sorry, no magic answers, just shedloads of empathy!
Good luck.
Tina