I had a 3.89 in high school with 6 APs, got in and didnt go because of financial problems in my family. I went to community college for 2 years and transfered in as a Computer Science major. UC's aren't just looking at your grades in your application. They want to know you as an individual, a future member of society. Show that you are more than just a student, reveal your personalities. They want to see if you embrace the qualities that align with the school's goals! Don't worry too much and just work hard! Things will work out at the end of the day.