..I need some help

so I’m Christian and we’re not supposed to go on birth control because it’s against our morals or something (I’m not 100% sure why lol don’t come at me) but I am sexually active and I’m not 18 yet so I can’t really make my own decisions with this stuff at the doctors but I want to have extra protection besides just condoms... is there a way I could convince my parents to let me get BC? Is there an over the counter BC? Please reply:))