Perhaps your body is telling you that the foods you previously decided to eat aren't working. Dont listen to the sibling poster to eat a burger and fries, thats non-sense (at least by my standards)

Us Americans (or if you arent American, the same applies to other first world countries) eat too much and they freak out when they hear someone else fasting. Now, your apparent depression does sound worrying to me, but you should be free to fast for a few days without the judgment of others.

But on actually eating something: Are you a fruit person? Try buying a container of raspberries, blueberries or strawberries (or whatever fruit you like) Ideally, also pick up something green (I like steamed broccoli sprinkled with garlic powder) Or have some oatmeal and throw any of those berries and a banana in (perhaps with some seeds/nuts - I quite enjoy hemp seeds in my oatmeal lately)

These foods are delicious to me and provide actual nutrition. Sometimes I fast for an extended period of time (skip a few meals to a couple of days,) but if these foods are lying around I tend to enjoy them greatly.

Also try peaking at the sun during sunrise. Great way to start the day in my anecdotal opinion. (And there is a lot of scientific evidence that sun helps with "blue" moods)