Birth Control

I told my mom back in February that I would like to get on birth control. She said she would make an appointment but never did. Last month I was cramping really bad from my period and she thought maybe I was having a miscarriage ( I'm not pregnant, never been pregnant) and made me take a pregnancy test but still didn't make me a doctor's appointment. I'm trying to do the right thing and protect myself but she isn't helping. What should I do?