Will norethindrone stop period?

Hi all! I was prescribed Norethindrone 5mg 3x a day to delay my period 10 days so I can be period free for my wedding/honeymoon. Instructions say to take 3 days before period starts but do to poor planning on my part, I got my period today and took my first dose today. Has anyone been in the same boat? My wedding is this Saturday and I’m wondering now if this will even stop my period and looking to hear from anyone else with a similar experience.