birth control & strict mom ??

I'm 18 years old and I just lost my virginity and started having sex with my boyfriend. We always use a condom and he pulls out every time. Are we being safe enough? or should I also go on BC? the only problem is my mom is crazy and super unrealistic and expects me to wait until marriage so I cannot tell her or ask her if I can get on birth control. I thought of going to planned parenthood but I heard that they can only give you a prescription for it but I can't even do that because I'm still in high school and I'm on my parents insurance so they will see birth control then my mom will find out. Is there any ways I can get it without any trace of my mom finding out? or is just using condoms and pulling out safe? any advice please!