birth control talk

so i’m 15 and not on birth control. i’ve been thinking about getting on it for awhile now.. before me and my bf even knew eachother.. my moms been bringing up sex and discouraging me from it. sometimes i think she knows i’m sexually active.. we’re always careful and use a condom as well as the pull out method at the same time. only once have i had a pregnancy scare and taken plan b but it was rlly just me freaking out. my mom will occasionally say girls’ moms who let them take birth control are oblivious and i don’t think i can talk to her about getting on it..