Long post warning!
Don't you just hate it when those doctors are right, lol? I think you are facing your demons head on (even if the doc had to show you the path). I know that you are a very strong person and can get through this journey, too. After all, you have all of us here who care about you and support you.
As others have said before the majority of us have some type of eating disorder. We wouldn't allow ourselves to get this big otherwise. At least you have a diagnosis and an approach. Now you get to fight the real battle and the triumph will be incredible for you.
I wish you the best,
Lori