Struggle with food. (TW)

I've always struggled with eating. Usually overeating. I would eat and eat and eat and never stop. The last new years I've been trying to healthy loose weight but it got hard. I was diagnosed as a type 2 diabetic and it's just really hard. I don't know what you eat, and what not to eat. It's scary and I just haven't been eating at all lately.. I'll have a couple crackers here and there and mostly fill up on cold water. I just can't bring myself to eat, I get so nauseous and it feels like my body is just saying no more I'm done.