There was a moment when I changed from an amateur to a professional. I assumed the burden of a profession, which is to write even when you don't want to, don't much like what you're writing, and aren't writing particularly well.
A story isn't a charcoal sketch, where every stroke lies on the surface to be seen. It's an oil painting, filled with layers that the author must uncover so carefully to show its beauty.
Try looking at your mind as a wayward puppy that you are trying to paper train. You don't drop-kick a puppy into the neighbor's yard every time it piddles on the floor. You just keep bringing it back to the newspaper.