Can you get pregnant 8 days before your period?

Depends: Depends on the length of cycle. Usally considered fertile in mid cycle.

Ovulation: Fertility depends upon when you ovulate in your cycle. Ovulation usually is just shy of half way through the cycle. Sperm left in the vagina on the five days leading up to ovulation are the most likely to cause pregnancy.

Possible: Possible pregnancy days statrt on 5th day from the start of period through 16th day.

Yes: Although it's not likely, since it normally take another week to ovulate, not everyone has a regular cycle with predictable ovulation. It's possible to get pregnant at anytime during your menstrual cycle. I wouldn't risk it!