i wanna go on birth control but i’m scared to ask my mom i don’t wanna ask her and make her think i’m having sex

then we have a talk and shit but just to make sure when i’m ready and he ‘Pulls out’ that there’s no mistake. and i don’t want her freaking out and stuff taking me to doctors seeing if i’m still a virgin. and i also heard it helps with cramps but makes you gain weight. i have a mexican mom so there crazy! my mom always says come to her when i’m ready ‘i can’t lock you in a room or something’ but ik my mom isn’t that easy going i’m just scared she’ll take my stuff away and think i’m seeing a boy and be on my case 24/7. i just don’t know what to say