Can you get pregnant if a boy came in you without breaking the hymen or pre cum?

Yes: It is very difficult from a practical standpoint to know where the semen went. And even if he or you did not think the semen was ejaculated in a certain place that is no guarantee. And even a very small amount of fluid can contain a large number of sperm. Always make sure you look out for your own health interests.

Yes: If the boy ejaculated inside you, even without breaking your hymen you can get pregnant.