Hi yes i was wondering the probability of getting pregnant 5 days before my period was supposed to start. we also used a spermicide film and plan b?

Ovulation occurs around 2 weeks before the period so you are unlikely conceived under the described scenario.

Conception has been documented from exposure at any point in a woman's cycle, including menses. It is rare at the time cited and with the spermicide and plan B used I don't think you are at any risk of conception.

From what you described it is highly unlikely that you are pregnant. You may do home pregnancy test 3 weeks after the episode of sex. If the result is negative, re do the test 4-5 days later, unless you get a period by then. Safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines