I have stopped writing.
Ok, no - that would be physically painful/impossible for me. I have, however, stopped working on my WIP and haven't really worked on any of my current side projects. I have been writing tons, but most of my writing is falling into the spheres of journalling or exposition.
I am experiencing creative stagnation. I don't think this is as painful as typical writer's block where the writer has something to say but just can't say it. I just can't disappear into my writing lately. Part of this is because I recently had a revelation: I don't write as well as I need to. I often fall into the common traps of one-dimensionality and too much 'telling'. I want my stories to have the impact they deserve, and I have come to believe that I am (at least currently) not the best person to write them.
But the more I put it off, the more crippling my doubt becomes. I now doubt every single thing I have ever written. I doubt my ability to communicate clearly - much less weave a web of dreams around my readers.
I have written in a sporadically prolific manner since junior high school. I wrote reams of poetry and piles of songs only to fall silent for long periods. I have had long periods, some lasting years, where I haven't written creatively at all. During each famine, I have doubted that I would ever write anything again.
The difference is that I have never doubted the worth of everything I've ever written.