Sleeping problems and eating issues are what signs of stress

Those symptoms are just common signs of stress. Being too busy or thinking too much in problems can contribute to having those symptoms, which is why it's important to take some breaks.

Have a nice day! :)

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.