I was sad from Nov - Mar, but I was not clinically depressed. I was doing all the healthy things I could do to get my energy and spirit back on the right track in my life. And while I was not immediately joyous as a result of these efforts, I learned that by sticking with the program, my program of healthy and conscious living, I could have all the things I wanted in my life.
The trick is breaking the cycle. My little death pony had me on his back and was telling me all kinds of lies about my failures, my upcoming failures, and my ultimate demise as a failure.
One of the most pivotal moments in recovery is admitting to yourself that depression is a problem. For me, isolation is pretty deep on the list of symptoms. By the time I'm isolating and fucking up at work, the other mechanics of depression are in full bloom.