My girlfriend had her period on the 2nd finished on the 8th. we had sex on the 9th, the condom broke i didn't finish can she get pregnant off precum?

Precum: Contains sperm and can cause pregnancy.However you can only get pregnant during fertile period (+/- 3 days of ovulation which occurs 14days before the first day of period. So if she was on day 8 and has a 28 day cycle you should be safe, if 25 day cycle maybe not safe. Can use Plan B pill if taken within 72 hours of intercourse.

Possible: The precum is secretions from the prostate, but it still might have sperms in it.