How do I ask my mom to get me birth control pills?

Bree

I'm 15 and i am sexually active, but I also would like to be safer than only using a condom. I don't technically need BC but I know I'm not ready to be a mother. me and my mom aren't close at all but I am on her insurance plan(I think that's what it's called) and can't get it anywhere else. She is the only adult that I could ask for this. plz help