ADVICE NEEDED!

So my mom and I agree to put me on birth control but she told me I'd need a Pap smear before my doctor approves it. I've had sex before but I told my mom I haven't. I know that getting the Pap smear will prove that Ive had sex. IS THERE ANYTHING I COULD DO TO MAKE IT SEEM AS IF I HAVENT HAD SEX? HOW DO PAP SMEARS EVEN WORK?