First, give yourself real time to process it — this is a genuinely difficult outcome, and rushing past that isn't productive. Then work to figure out exactly why, rather than guessing. Ask schools directly for any feedback they're willing to give, and have a pre-health advisor or a current medical student review your entire application from the outside.
Only reapply once something has materially changed since your last cycle: a meaningfully higher MCAT score, substantially more clinical hours, a rewritten personal statement, or a corrected school list. Reapplicants get admitted every single cycle — the ones who succeed are almost always the ones who changed something real and specific, not just resubmitted the same application and hoped for a different result. If you want a second set of eyes on exactly what to change, a full application review is built precisely for this situation.