Talking to religous mom about having sex?

Okay,
I come from a very religous family.
I am a christian as well.
Im 15, and I have been thinking if it is very wrong to have sex even if you are protected with birth control and condoms.
I know I am not yet ready to. But I also know I wont wait till...

marriage.
I want to tell my mom, but she will more than likely freak out and think that im wanting to be put on the pill so I can as soon as I get the chance.
This is not the case.
I dont want to be a slut.
I want to save it for someone special, and someone I can see myself with for a long time.
I just dont know how to explain this to my mom without her thinking I am going to right away, and she wont be able to trust me when im with my boyfriend.
Please help!!!

have a talk with your mom? this will for sure freak her out it but it will show her you might be grown up a little when you want to she will not resent it enough but know that maybe you should find the rite guy first I mean dont go looking for him because if your religious like you said you know god makes things happen for a reason. your mom may not want you to have sex but god knows when your ready and will help your mother to realize it. dont worry so much about whether your mother is ready because she is not the one who nos god is and god will make you ready when he thinks and you will know

tell her you need the birth control for your period because your periods bad.
(birth control helps control your period. like how bad your stomick hurts or how much you bleed.)
and you can buy condoms at the store.