The pill

I'd like some advice on going on the pill. Me and my partner would like to start having sex with out a condom. My parents aren't to comfortable with the whole sex topic and they don't know that I have had sex,  
even though I'm 19 but I still live at home. I just don't want to go on the pill and then we practice unprotected sex and I fall pregnant. I guess I'm just stressing a lot! Help