You will have to kill your OAT. What is your cumulative vs pre-req gpa? Some schools focus more on your pre-reqs, some maintain a strict policy regarding your cumulative grades. You will have the most luck at schools that look at your grades as a whole to see an upward trend. I think most important would be to get your pre-req grades up since in my experience, that's always something they've focused on. Even with better grades later on, you still need strong grades in your pre-requisite classes (they will help you get in the door). Also, another consideration is how the school calculates your retaken classes. Some average the grades, some look at the last grade, some look at the way your undergrad calculates the GPA. The best way to find out is to get in contact with each of the schools you are thinking of applying to--and while you're at it, some admin counselors will agree to take a look at your grades, scores, etc and offer their advice on how to improve your application (these were the sources of the most helpful advice I got).