Is that sub-3.0 even going to make it past the initial GPA screening? I would try to schedule an appt with a DS admissions officer (I know some schools will do this) to discuss your situation.
Also, I don't mean to be rude, but if you haven't yet earned a 3.7+ while taking science classes, I wouldn't bank on it for the next 4 semesters. If you're earning a 3.0, you need to change things SIGNIFICANTLY before you can comfortably say you think you'll be earning 3.7+'s. Grade-wise you need to be earning as close to 4.0 as possible with a course load that is intelligently laid out so that you're not taking fluff classes but also able to achieve that 4.0. And that means buckling down to study, getting tutoring for classes you're having difficulty with, etc etc.