There is a possibility of pregnancy in this case because the chances of conception are greatly increased when having intercourse during normal ovulation, even if only a small amount of sperm enters the vagina, and the possibility of pregnancy is reduced if the number of sperm is too small to reach the normal number. Even if a woman is not in ovulation, there is still the possibility of accidental ovulation, and as long as a sufficient number of sperm reaches the fallopian tubes, it is possible to fertilize the egg and thus become pregnant. If you have no intention of getting pregnant now, you can take the emergency contraceptive pill. The emergency contraceptive pill needs to be taken within 72 hours after intercourse to be effective. If this time has passed, you need to use an early pregnancy test or go to the hospital to have a blood test for HCG to determine if you are pregnant. It is recommended that people who do not want to get pregnant should not take any chances and take good contraceptive measures during intercourse.