It comes and goes.
I have periodic bouts of depression, blues, whatever you want to call it. They're sudden and as often as not precipitated by no real event or issue. Yesterday morning, all was right with the world. Last night, I couldn't stop crying. Today, I'm just a little numb. This will pass, it always does.
I've tried medication, and it works, but I think it alters my personality, and coming off anti-depressants is just awful for me. I'm glad they're available, and I don't rule out trying them again, but I don't want to face the side effects and the withdrawal again, so I'll just fight it out. Meanwhile, blogging may be light or nonexistent for the next few days.