the pill

This month was the first time for me to use the pill. I wake up at 6:30 every morning to take the pill. Four days a go I guess I was still sleepy and took one of the placebo/ sugar pills instead of one of my third week pills. I've have continued to take the third week pills and starting on Saturday will be starting the placebo week pills. When I took the placebo pill on accident instead of the third week pill, my period started. I have been on my period for 7 days and I am normally on my period for only 5. I was wondering if my period would continue this week because I have to take the placebo pills?