I'm beginning to see self doubt as a major case of gas.
It rumbles around, not quite sh*t, but causes all sorts of discomfort until it is melodiously or silently released. And when it does, it stinks.. big time. But at least it's out and you feel better. Granted.. it may take quite a few passes to rid yourself of it, and there might be another one around the corner. But you expel it and keep moving on.
In fact, moving really helps bring relief. So perhaps, Mike.. just perhaps, all this wondering is really your gas of self doubt moving through.. processing.