How to get birth control without my mom knowing?

If you go to a free clinic (such as a Planned Parenthood Center) it will not show up on any bill and it will be free until you're 18. I used to go there because I didn't want my mom to know. They won't contact anyone about you or make it know you're a patient or anything. I think that's a good way to go if you're really that uncomfortable speaking about it.