birth control and a controlling mother

My mom is the type of mother that is overbearring and controlling. She controls as much of my life as she can. I'm on depo currently but wanting to switch birth controls because of the horror stories about depo I want to go back on the pill but she refuses to let me go on it. I'm 17 turning 18 in a few short months she knows I have unprotected sex but she has no right in my opinion to be in control of what I take as far as birth control she controls enough of my life as is I don't need her  "protecting" me from a pregnancy. I've always wanted to have kids young. I'm hoping to move out once I graduate take the money and run with it for the hills!! Anyways how do I get her to let me go on the pill. Of course her house so it's her dumbass rules.