Getting into an ivy league college.?

i want to go to an ivy league college. im a freshman in HS and want to be a pediatric oncologist (cancer) and i would say im well rounded. i play violin, play 2 highschool sports (bball and fastpitch), and i am taking honors worlds studies and advanced math. i do lots of volunteer work in hospital related areas.I am planning on taking IB bio and chem and some other cles in a community college nearby. I have an average GPA of 3.75-8. do i have a good chance to get into an IVY school if i keep this up till senior year? and have good sat scores?