Hello, and I hope I can help you today. Northisterone is a synthetic form of progesterone that, once the course had completed, should make you menstruate in 3-7 days if your estrogen levels are normal. So I would try to be patient and wait another week for your period. If you still have not gotten your period after another week, I would perform a urine pregnancy test to make sure you are not pregnant already, and if not, I recommend consultation with a fertility specialist as they can perform hormone tests and suggest the proper treatment to help you ovulate to have regular cycles and also help to conceive. I hope this answer was helpful, and best of luck with your condition, Dr. Brown