parents and pregnancy...

so I've been dating my boyfriend for a while and I honestly want to get pregnant, but my parents say I'm too young, and I know my boyfriend would totally freak out first if he found out I was pregnant (but I'm not at the moment) but would eventually be great full. I know this because I've asked him before... but my parents are still against it and they're forcing me to take birth control and they keep track of them and they watch me take them... ughhh help!!!!