I want to start birth control

I dont wanna tell my mom about my sex life or why i want birth control so i wanted to ask if im able to get birth control without a parent and if i have to pay to get birth control ? Im eventually gonna tell her im on it i just dont want her to freak out. Im not sexual but i am in a 2 year and 7 month relationship and anything could happen so i just wanna be safe and prepared.