HELP!!!!!!!

I’m a teen and I’m catholic and my grandparents which i live with are also catholic, my friends are starting to explore new areas and I want to but It doesn’t mean I don’t believe in my faith and I don’t what my grandmother to look at me another way. If I’m think about it i would want to be put on birth control, but don’t you need parental permission? I don’t know what to do please someone help! I mean if I save myself for marriage there aren’t going to be any guys that save them selfs too. Please help!

edit:

It’s not to be cool it’s just cause I feel like I wouldn’t want to wait, (I’m 15)

edit:

I don’t think there’s a planned parent hood near me I live in a very small town