How do I get birth control??

Sarah
I've been thinking about getting birth control these past few months and now I'm for sure I'm going to get it, but I don't know how to go about it without telling my parents. I'm 19, has an unpaid internship so I'm broke lol, and my parents are Christian and against birth control. And I know they are bc my brother and I asked my mom if I could get birth control for my cramps (his SO uses birth control for cramps too) bc I can barely even move or get out of bed when I have them and she freaked out on me. What should I do??