Take this from an adult homeschool alumni (me): It's better for you to stay in public school so you have a chance of "catching up" on math. Imagine how much more behind you'll feel as an adult. Homeschool alumni are notoriously behind in math and science. :/ So you are not alone.
I recommend trying these books to help you catch up: https://www.amazon.com/10-Minutes-Day-Third-Grade/dp/1465417176/ref=sr_1_2?ie=UTF8&qid=1473086496&sr=8-2&keywords=math+10+minutes
I used ones like them when I left home and the last college level course I took, I ACED so you can do it but you have to put in extra effort. Good luck.
Homeschool Resources: Basic Tips for Surviving after you graduate: https://hareachingout.wordpress.com/for-alumni/ Educational Neglect Advice: http://www.responsiblehomeschooling.org/so-you-have-a-deficient-homeschool-education-what-next/ DOHSN Youtube Video like and share (spread awareness with non-homeschoolers): https://www.youtube.com/watch?v=lGThw0PX-Cw