Oh, do I know how you feel. I was free from this demon depression for about 10 months. Some of that time was on medication, then off of it. I was feeling very good...and then, seemingly out of nowhere, it returned even worse than the first time. I've been taking medication again (reluctantly) and they are (admittedly) working...I'm also reading a good book called "The Depression Cure" by Stephen Ilardi. I do hope that your depression passes soon too.