Hi I Started Taking Primolut N On Thursday Last And

Hi I started taking primolut N on Thursday last and my period stopped Sunday. As of today (Thursday) my period is back which defeats the purpose of me taking the pill as I was prescribed it because my period lasted over 3 weeks last month and she told me to take 3 tabs a day for 5 days an start fresh on the 4th of next month which is day 1 of my cycle and I'm to take 3 tabs a day for 10 days. Please help I'm at my wits end. Should I take more or not take any??