What a WONDERFUL thing you are doing right now! I can only imagine how hard this must be and weigh on you. The good thing is: it will never be as hard as it was for you over the past 3 years, which are THE WORST.
My 12-year-old son was dx'd almost a year ago, with an A1c of 12.5. He did not gain any weight (beyond his normal growth) in the time since his Dx - if anything, he has lost some fat, and he is a bit too skinny. Some of the reasons why, I think, are:
- we eat TONS of vegetables, with a lot of fiber - broccoli, cauliflower, salads at every meal, etc.
- he starts every meal with 2 glasses of water
- we have diabetic-friendly snacks at home (for instance, dried edamame)
- he eats medium carb meals (probably a bit below 150 carbs per day, not counting glucose for his BG) rather than high-carb meals
- he exercises a lot, which also decreases his insulin consumption by probably 40% or so
I don't have personal experience from recovering from diabulimia - but from other, similar problems, my suggestion would be:
- create an online network of people with the same issues on line. FB has GREAT diabetes groups with a lot of people your age, this forum, etc. Peers who are facing the same hardship are a great recourse and encouragement.
- if you are in college, see if there is a diabetes group there, and what resources are available on campus.
- possibly volunteer in a camp for diabetic kids this summer. You will make many friendships and will keep in touch. My son and I went to such a camp last summer. The volunteers told us they have made lifelong ties and keep in touch for many years on line.
- get a CGM. My son's self management was totally empowered by his CGM, and he really manages himself to his CGM. We LOVE his Dexcom.
- possibly share your dexcom data with those close to you, so they can alarm you in the middle of the night if something goes wrong as well.
I sent you a PM as well. You deserve to succeed, and I am sure you will. If you can remain involved in this forum this would be helpful to you as well, I think. We are peers also, in one way or another.
EDIT: my son is adding that, among all his sports, the one that, in his opinion, has the most impact on his BG and insulin consumption is swimming (fairly hard sessions).