Thank you for posting your question here, I will try to answer it to the best of my abilities.
The days on which you ovulate are the danger days. So check when your last period was, add 14 days to that, the 4 days after that are the ones when you ovulate. As such these are the danger days when you can get pregnant, so avoid having sex around this time.
You can also try using condoms or contraceptive
I hope this answered your question.