I took contraceptives and I menstruated before the card went out?

Hello, 1 year contraceptive tome and today I menstruated 8 days before the pack was finished, I usually menstruated every other time. A brown mucus came down yesterday and today came blood. Did I have a period? What happened?
Expert answer:

It can be an escape bleed or a menstrual irregularity. When it happens once, there is nothing to worry about. This is quite common and usually does not mean anything, but if it starts to be repetitive, you should go back to your doctor.