I don't think you should give up. As long as you justify somewhere in your personal statement why you withdrew an entire semester and then show nothing but an upward trend and improvement you should be ok. You may need to take some of the prereps at a four year college, you MAY. I would speak with the schools you are looking to apply to, directly. See what they recommend. And then of course, kick ass on the DAT and get some shadowing in.