I want to get into a good MD program, but I have a 3.1 science GPA (this is in my first three semesters, 10 science credits) - I got a C+ in general chemistry, a B+ in organic 1. I also have three W's on my transcript from dropping organic 2, organic 2 lab, and calc 2. I have a 3.5 cumulative. I'm concerned that I've already ruined my record by doing so poorly in the start. What can I do to improve this, and do I still have a chance?