My dr has prescribed to me Nora QD because I am breastfeeding but I have noticed that I am skipping periods and I will have a period in the middle of the pack not at the end... is this normal. I have told my dr but he says its because of me breastfeeding. My periods will vary and the latest one has lasted for over 7 days but the period is very light?? Can I stop this and why are I having it at the end of the pack like everyone else??