please help, i might be pregnant

my period ended on the 6th of december, i should be starting very soon. i've had unprotected sex a few times and we used pull out method. yes he could've had pre cum. i'm really really nervous, and i know i should be using contraceptives, please don't tell me i'm too young to be having sex, because a lady has to do what a lady has to do. i plan to take a test soon, i'm just figuring out how to get one without my mom finding out. i'm really scared, and if anyone has any advice that would help me a lot 😔 i'm not ready to have a baby.