Preventing Pregnancy

I'm super horny all the time! I'm not on birth control. I'm thinking about taking to another level with my boyfriend. But I'm seriously worried about getting pregnant. I feel like I gotta do something because my urges are becoming unbearable. To the point I get aggravated and have a headache. Am I normal? Lol I can't get on birth control cause my parents think that just giving a free ticket to fuck. I still live in their house while I'm attending college. I'm 19 and not a virgin! Plz help any advice?