Please know that I have no medical or psychiatric training and nothing published on this site should be considered medical advice, only my own personal experience. If you're looking for more information about depression or other mental illness, below are links to some resources I have found helpful or that are widely known and respected. 

https://www.nami.org/Learn-More/Mental-Health-Conditions/Depression

https://www.nimh.nih.gov/health/topics/depression/index.shtml

http://anniewrightpsychotherapy.com/2016/03/101-suggestions-for-taking-care-of-yourself-when-it-all-feels-like-too-much/

http://www.suicidepreventionlifeline.org/