You may be depressed in the moment, but not clinically depressed. It is NORMAL to feel sad once in a while, although our society wants you to think otherwise.
If you can answer yes to, " do you feel like hurting yourself or others" then get off the internet and seek medical help. Otherwise go take your GSD for some long hikes and increase your endorphins - Exercise and Depression: Endorphins, Reducing Stress, and More
Take care of yourself, eat well, sleep well, treat yourself. The biggest comfort for me is my faith (Christianity) , its one of those things your not supposed to talk about like politics, but if you do need to talk with someone, try a faith based counselor. Although things have gone wrong, you have several opportunities in the future for right things to happen. Focus ahead, not behind.