Use disappointment to redesign, not disappear.

Disappointment carries energy, and that energy tends to go one of two ways: into withdrawal or into rework. The first feels safer and takes you out of the game; the second uses the same feeling to change something concrete. It is largely a matter of where you point it in the first few days.

When the sting is fresh, choose one specific element of your approach to change rather than deciding anything about whether to continue. Small redesign gives the feeling somewhere useful to go. The larger questions can wait until you are steadier.