reassurance please

vhhg

okay, i’m pretty positive i’m just freaking myself out. i’m 15, my period was supposed to come 12/31/18. my first day is always super super light. i’m freaking myself out, yes i am sexually active. 15 may seem a little young but i am very safe. i’m on birth control that i take the same time everyday, i’ve never missed a pill and i’ve been taking it since july. i always use a condom, and my boyfriend has never actually came inside of me. when he gets close, we usually get rid of the condom and i give him head because we are both scared i would get pregnant. so, we have maybe had sex 4-5 times this month? we always use protection. i know that there’s always a small chance, but i take ever precaution necessary to make sure i don’t get pregnant. i just need some reassurance because i’m just kinda scaring myself.