Pregnant while on birth control ??

So my S/O has been begging me to get my birth control for weeks cause he wants to cum in me 💦 so i finally got it and waited a week like they asked me too 🥺 but im really scared of getting pregnant 😤 last time he came in me i got pregnant 🤭 so should i let him? Or just take care of myself cause i know birth control is only 90% effective .