I learned to drive when I was about 16. My parents never had any food in the house, plus two extremely aggressive dobermans in the kitchen, so I couldn't go in there anyway.
So sometimes I would sneak out right before MacDs close and eat a burger in the parking lot.
I'm a lot older now, but occasionally I still eat fast food in the darkness of the Walmart parking lot
I find it calming for some reason.
Bonus hilarity:
At Xmas in 1979 I had an Xmas tree lot with a slave driver boss -- 12 to 18 hours a day. (He did partially pay me with a shopping bag full of wed.)
On night I got off around midnight and headed off to the local Mcds, order my food, and visit the restroom to take a piss -- and somehow managed to drop my car keys in the piss water.
Not my favorite day ever.
Then I get home and find that they had released the dogs in the whole house and I had to yell and pound on the door to get my mother to lock them up.
Ive had diabetic ketoacidosis a few times. Once it starts coming on you can't eat Anything. For a couple days or more.
Then the treatment is ice chips and IV insulin for a few days.
Coming out of it, your stomach is the size of a walnut and the thought of eating makes you want to make you puke.
My roads back to eating:
Broth from ramen cups. Liquid meal replacements. If you have a soy allergy, take a close look at the ingredients. Miso broth.
Drinkable yogurt.
Bland pasta with just olive oil.
Granola bars.
My experience is that I eventually get hungry again.
Best of luck dealing with your situation.
Edit: per others, chicken soup (I can get the broth down) and Pedialyte or Gatorlyte. Getting dehydrated does not help.