I was in the same boat 3 years ago. I didn't take the prelims seriously, only applied to a few places, and then I didn't match.
Something happened starting with 2007 scramble that was unprecedented before. Going into that scramble in 2007, my medschool's dean told me that I had nothing to worry about and that the ball would be in my court to choose from a multitude of programs desperate to fill their spots. I started the scramble day feeling confident I would end up somewhere decent. In the beginning, I was being a little picky. We called 8-10 transitional & prelim-medicine places where I would've been happy to end up at, but none of those places would offer a spot right away, so then I decided to wait for their responses for 2-3 hours. I was reluctant to call places I was hesitant about going to, because I didn't want a situation where they offered you a spot right away and then get stuck having to accept going there.
Well, none of those 8-10 places got back to me. We called them back from time to time and, when we got through, we were told that they were still deciding. But, as we called them back for the 3rd & 4th times, they were now telling us they had filled. We then switched gears and then started calling all the transitional & prelim-med places anywhere in the country, ready to pounce at any place that would offer me a spot. By then, we were a few hours into the scramble and, unbelievably, every program was either filled or impossible to reach.
Day 2, we had no choice to focus on prelim-surgery. But even prelim-surgery spots were slim pickings. In fact, I recall that none of the places with open spots were reachable. What we found out was that the very few programs that had any documented spots left were those that appeared to purposefully leave spots open to be left up for grabs by FMG's with best possible credentials... those programs were soliciting applications from hundreds of FMG's and then would decide on the select few to invite for interviews in late-March to fill their remaining spots. I think a lot of those spots may not have been available for the match to begin with. Those programs all along probably intended to fill them outside the match.
In the end, I could not scramble in anywhere. There were like 3 other people from my school in the same boat as me. The dean said she'd never seen anything like that before. Later on, I found out it had to do with sudden increase in FMG's (many of whom have excellent credentials), although that was purely speculation.
To the OP, I really hope things worked out for you. But if not, don't lose hope. Start emailing a bunch of prelim programs and beg them to keep you in mind in case someone leaves. There's always movement, people have stuff happen in their lives and they have to give up their spots or whatever. I was eventually able to secure a prelim spot at a decent program a month later, when one of their incoming interns had to quit for family reasons.
