With plans, days, books, relationships, projects -- try again. Why not see this thing through, even today? Why not save yourself the running and the worry and all of the energy for something else?
Yes, release brings relief. And maybe the timing isn't quite right to give it another go. Good thing is life will probably eventually find a way to revisit whatever it was in you that needed work. So pay attention; be open to a good stretch, to success, maybe even failing again. You will get there.