For those who plan to reapply, I strongly recommend waiting a bit. Take some time to embrace your new Plan A -- get excited about your summer, attending college, doing NROTC . . . whatever your plans now are. As a college applicant, USNA won't look at your packet until first semester grades are in (usually mid-to-late January) so you have plenty of time. Even for MOC noms, you have at least 6 months, and in most cases, more than that.
As others who've reapplied have artfully stated, you will mature over the next 6-10 months as you transition from a h.s. student to a college student. You want that "new person" to come through in your applications to USNA and MOCs which is why you should wait to write your essays, etc. Also, along the way, many find they LOVE their lives and that what at first was a "Plan B" has turned out to be better than they ever imagined. Give yourself a chance to experience that.
If your desire to attend USNA still burns, then go for it! But keep in mind it's not the only path to a commission and definitely not the only path to success and happiness in life.