Seriously, see what your test scores are and then start making these evaluations. Did you take the PSAT? Did you take a practice ACT as a sophomore as well (many do)? Worrying about your grades with no test scores, or about your test scores when your grades are incomplete, can both be a waste of time. Focus on your ECs and think about what you may want to study, areas of the country you want to live in (northeast schools or west coast, etc.), the type of large/small campus you want, etc.