Yes, it is possible to get pregnant. The most fertile days are the three days leading up to and including ovulation, the time each month when a woman's ovaries release an egg.
However, it is possible to get pregnant if you have sex during your period. This is because you can still get pregnant if you have sex during the five days before ovulation or on the day of ovulation.
While it's not common, the possibility exists because your menstrual cycle can vary, and the exact timing of ovulation can be hard to predict.
Therefore, if you are trying to avoid pregnancy, it is important to use reliable contraception methods, such as condoms, hormonal methods, or barrier methods.