Birth control

I’m 15 and sexually active with my boyfriend that’s 17. Right now we use condoms but I want to go on bc. My mom stated that she doesn’t want me having sex and I can’t bring myself to telling her that I am since knowing her she’d make me end things with him. Because she thinks that that’s the only reason he’s with me but it’s really not at all. I want to know if there’s anyway to get birth control for free under my insurance but my parents won’t know about it. I know that it’d show up on their insurance, but i’d also be willing to pay monthly just not a lot since I can’t afford much. I just don’t want my parents to find out. I know some of you may say to just stop having sex but if it’s possible for me to get on bc then I want to.