So the only way possible would to just reapply next year? Obviously while working w the program I matched with today?
What if I find an unfillednposition now?
What part of "the Match is a binding contract" is difficult to understand.
You are committed to starting your program and being there for at least 45 days per the terms of that contract (which you willingly and voluntarily signed). After that time, you are welcome to walk up to the PD, smack him/her across the face and walk out.
But here's the real issue...what do you think will make you a better candidate, and more likely to match higher on your list or at a "better" program next year? The answer is that there is absolutely nothing you can do between now and then that will improve your chances, and in reality, no matter what you do this year (complete it or quit), you will be a weaker applicant next year.
I understand that you're disappointed with your match, but you did match, and you obviously felt that matching at this program was better than not matching at all, or you wouldn't have ranked it. Me telling you that there are (literally) thousands of people out there who didn't match or SOAP this year and would (figuratively) kill for your position isn't really that helpful to you. But it's the truth.
Honestly, take some time to yourself. You matched. It's OK to mourn not matching higher on your list than you wanted to. But after a few hours/days/weeks, you need to move on and get ready to be the best damn intern that program has ever seen.
EDIT: @mcl and @AdmiralChz were both typing at the same time I was writing this reply. Otherwise I would have left well enough alone.