Yes, this is depression and we all have been there. Even the people you see with smiling faces go through this.
I totally understand. I want to send you a big hug right now because you probably need some loving support around you. I know when I go through this, it has to do with what is happening around me and I feel stuck or like I don't have control over my life. The best thing that I have found, is that I take my time and KINDLY take a nice shower or bath. Maybe give myself a face mask ( Be kind to yourself and your body right now) Then I go out and take a leisurely walk in nature. No hard working out, just kindness to myself. I may even go to a book store or the library and look through uplifting books.
The bottom line is the depression hits hard when you become a slave to the thoughts about your circumstances. I have found that unfortunately life is not always fair. But what we do have control over is our thoughts and how we deal with these circumstances. Give yourself a healthy break from worrying about anything. Do what get's you focused on just being with yourself and feeling good other that food.
Another little trick I use, is I go on the web and look for funny videos that will make me laugh. It always helps me feel better.
Again, I am sending you HUGE hugs.