Is there a way to get birth control without my parents knowing?

J • Just trying to learn about life ✌🏽

My mom refuses to put me on birth control bc she thinks it will encourage me to have sex. I'm already having sex (that she doesn't know about and no I'm not going to tell her) and I want to be safe (we use condoms) but I just want something as back up. I just don't know where to buy it or if I can even get it behind their back, pls help me

I'm 17, still on my parents insurance, and I live in NJ