Can someone get pregnant 4 days before their period?

Emergency BC: .Anyone having intercourse without birth control or condoms may get pregnant. If intercourse was within 72 hours you consider taking plan b. Ella (ulipristal acetate) is another brand that can be used up to 5 days after unprotected intercourse. Plan b is a high dose of birth control to disrupt the hormonal patterns to delay or prevent ovulation. Abnormal bleeding after is common. Check preg test in 10 days.

Depends on cycle : This would not be typical, but it depends on how regular your periods are and whether the bleeding that you describe as your "period" was a normal period. Typically ovulation occurs 14 days before the next period. The egg can be fertilized for 1 day, but sperm live for 4-5d. If you don't want to be pregnant, talk to your doctor about birth control options.