well, texas. there's probably NOTHING you can say to your daughter. she's 14 - and NOT ready to hear much of anything from mom... but she's obviously grappling with some serious issues. and she's probably scared. i wish i could help here...
as for the emotional eating, it's really hard. no two ways about it. therapy helps. not everyone chooses that road. i've found that 'substitution' works for me. so i knit. take a walk. i realized that the eating was stuffing emotions down my throat and that i was stressed and needed comfort, and then the job was to find comfort without food.
it's a struggle on many many days. and, as noted above, feeling your emotions isn't all that pleasant. but as one of my friends has said, just hold on tight, let the emotions sweep over you, like standing in a stream, and then it'll be over.
the trick is to not do any more damage to yourself while the stream is rushing by.
it's hard.

Your post made me cry. I wish all parents felt the same way you do, and were as supportive. 