Hi 25 to life for some when they are experiencing depression their appetite decreases, for others it can increase. Eating regular, healthy meals is ideal and 12 lbs. in a month is a significant weight loss. The fact your depression may seem "better" when you are starving yourself may be because it is linked to feelings of control. When we are depressed we don't have control over our mood, but you can definitely have control over what you eat. It's not healthy and I struggled with over exercising for many years prior to my diagnosis.

The feelings of fatigue may be linked to the depression and/or may be because you aren't getting the proper nutrients. What I have done over the past year is I just force myself to continue with my routine. Going to work, sleeping regularly, eating regularly and exercising etc. If I don't I find the depression gets worse.

If you aren't seeing a mental health professional I would suggest that you get a referral to a Psychiatrist. If you are already seeing someone let them know what you have been exeriencing. I hope that helps.