Im 14 and im worried im pregnant. what do i do. im scared.?

hey im Kat im 14 and i had sex with my boyfriend today who is 16 he is really good to me so that's not a problem but we did do it unprotected and there was a lot of pre-***. ive been hearing from people that you can still get pregnant from pre-***. he did pull out though but i hurd that doesn't work after we had sex we did it for about 5 minutes then he pulled out and busted then he wiped it off and went back in. im TARRIFIDE! my parents think im a perfect little princes and dont know im sexual active or im even hanging out with boys. i just need to know what the percentage is of me being pregnant, when should i take a test, and how to tell my parents i have talked to my boyfriend about this and he said he will stick with me no matter what and he loves me. but im just about to cry cuz im so scared i made a big mistake and i just dont know what to do please help!