What does spotting mean after a delay in taking a Yasminelle tablet in the second week? Is contraceptive protection maintained?

I've been taking coc for about a year (yasminelle).I missed one pill at the end of the second week,according to the instructions, I drank it as soon as I noticed it (it was already 12 hours later).Spotting brown discharge began,and later generally bloody.Now I take the medicine for 3 weeks according to the schedule .Tell me,what does the discharge indicate and does the contraceptive effect persist (sexual intercourse took place for 3 weeks without additional protection)