You can look up study guides on here. But the general process is content review with anki cards over khan academy videos or whatever your favorite company is (doesn't matter). Then practice questions/tests, and learn what those questions revealed you didn't know. Rinse and repeat.
Like gyngyn said this isn't a great situation, but if you're dead set on attending this DO school, I guess just hunker down over the next few weeks. At this point I'd just start taking practice exams and learning what you don't know, and repeating that process. It's a bit late in the game to sit around reading books