Hi,i've Been On Migraine Medicine For About A Week,that May

Hi,i've been on migraine medicine for about a week,that may or may not affect birth control(i was told by two pharmacist that it doesn't affect the pill)while still taking my contraceptive pill.I've been off the medicine for 6 days while still taking the pill but had a condom accident today.I took plan b within the first 30 minutes,am i safe?