precum & the pill question !

my mind is getting the best of me for some reason right now and im fully aware this is a stupid question but ive always been afraid to get pregnant so i take the mini pill and always wear condoms when having sex, but lately ive been feeling a little less anxious and my boyfriend and i have done it raw the past few times we’ve had sex. i won’t let him finish in me still but the precum is what scares me. what is the chance of getting pregnant while taking the mini pill (on time everyday) from precum? again, we practice safe sex but i have bad anxiety especially when it comes to pregnancy.