@gonnif has some really great advice about reapplying, and the main point that he repeatedly stresses is that the most common mistake reapplicants make is applying again too soon. If you're fairly confident that your issue was something easily fixed (school list, late application, etc.) or if you've made significant improvements since the start of the cycle, then your best bet is to take the above advice and quickly apply to one school to get verified and wait and see. If that's not the case, though, as unpleasant as it can be to consider, you are probably better off taking at least another year to strengthen your application. You want to apply again when you're at your best, even if it means having to wait.
Good luck to you and everyone else on this thread! Fingers crossed for you all big time!