Being this far along in the Public system, I would just keep what I got. Why, don't you want to have the joy and honor of graduating amongst your peers?
If you want to you may. I did almost the same thing. I attended my local high school in 9th grade, and it was terrible. Now almost half way through my Sophmore year, i plan on going back to public school, this is not because home schooling is bad. I had been homescholed my entire elementary and middle school life, and it was great. Homeschooling is tough though, the work is harder. So if you wish to Homeschool, Go for it! it is a wonderful experience. ~Danielle