I started taking yaz birth control pills last tuesday on the first day of my period. It has been 8 days and I have taken all 8 active pills, but I still seem to have my period. My periods typically last from 4-6 days and on the last few days are much lighter but the bleeding I am experiencing now does not seem to be the usual end of my period spoting. I am also still experiencing slight cramping. Is it normal to have a longer period and cramping when birth control is first started?

Thanks
-cas