You have a shot at acceptance to the schools in your title, but they are reach schools for everyone. They just receive far more applications from strong candidates than they can accept. I will page @hebegebe who may have additional insight with relation to your silver medial in the Olympiad for medicine.
Since you’re open to schools in the eastern half of the US, you may want to consider Case Western. It is very strong academically, but not as competitive for admissions as the schools you’ve mentioned, and if it thinks you’re genuinely interested in attending, it can also give very generous merit aid. But demonstrated interest at CWRU is very important.
Additionally, make sure that you apply to more UCs than just UCB. UCLA has all the majors of interest as does UC-Santa Cruz.
If you’d prefer to stay closer to California, you may want to look at Arizona State which has all of your majors and would give you merit aid and would be very likely to accept all of the college credits you’ve earned (which most privates schools will not do).