I say get some focus. You said either business or Med school. First thing, choose one and stick with it. What are you going to do with both business and med school. Don't divert your efforts.
If you choose business, you can always do econ now, since they only care about pre-req grades anyways. Or you can do haas who looks a lot at improvement, so just improve your 2nd semester.
If you choose med school, you have 7 semesters. And always consider pharm or dental or other options. And if you feel like science just isn't your cup of tea, know NOW. Don't keep pushing... find something that you can do well in. (I know I made that mistake) ^___^
I changed both my majors and my minor junior year. Start early... don't make the same mistakes as me :S Things aren't going to get better if nothing changes. Either change your habits, or change your classes, or change your level of motivation