Assuming that you have a regular cycle, ovulation will occur on day 14-15. Meaning your egg will be released (ovulation) on 14th or 15th day.
The sperm can live max upto 4-5 days and egg only 24-48 hours. Now, if you have unprotected sex continuously 4-5 days before your ovulation and 1-2 days after ovulation, chances are you might get
pregnant.
Sometimes ovulation can be very erratic. Especially if you have conditions like PCOS.
Next Steps
Calculate your ovulation date from the first day of menses and plan sex accordingly
Health Tips
Condoms not only protect from unwanted pregnancy but also from sexually transmitted infections. Keep them handy.