Long time guitar owner here. You could get some wood glue and use a small amount to affix the chip back to the guitar pretty seamlessly so long as you've got a steady hand. In my experience it's harder than it looks.
My direct advice? Keep the missing chunk in a safe place and live with the guitar as-is for a month. There's no rush and this will give you some time to process.
If the gouge ends up sticking in your mind as something you want gone? Call a local luthier, explain what happened, that you'd like it restored, and ask for an estimate or evaluation if you want to budget for the expense. If you have a preference for a kind of repair you can ask for that too. Mending a wound on an instrument can be an opportunity to add beauty instead of simply removing a blemish. What kind of repair you want is entirely up to you and a temp fix now might make the repair more difficult / expensive.
If none of that sounds appealing and if after a few weeks the idea of a nail polish scar or other punky hack makes you happy then go for it! It's your instrument and best is conditional so go nuts. π
My only concern with leaving the natural wood exposed would be moisture and cracking/paint flaking over time. Even if you think the chip looks bad ass and you end up wanting to keep it: I would ask a luthier to seal it up to preserve the instrument (battle-scar and all).