Good high school GPA?

Im worried about my grades. Im currently in 10th grade. I had mid-high 90s my whole life but now in high school im down to a 90-91. My current GPA is a 3.38. I just got a (another) report card up to not up to my standards (a 90.25 avg this quarter) and am thinking of switching from my private school to the very good public school whose district I live in. I also have received an 1880 on my PSAT (when converted into SAT format).I also play four varsity sports and play another year round outside of school. Am I doing good!?!?