It sounds like you have an eating disorder, or the depression has reduced your eating to almost nothing. You NEED to get help with this, 500 calories a day is not enough.

You deserve to be healthy and happy. Please call a doc or T about this!

I have done this twice, where I thought denying myself food would take back the control that the depression stole. That's not true, it doesn't work like that.

Here's some hugs/love to help