i started taking birth control pills in November and in the begining of December i missed about three active pill three days in a row and i had unprotected sex in between i stopped taking the pill and started a new pack the sunday after i received my period on December 16, 2010 and then i stopped the pill all together and i got my period again December 28, 2010 for three days and it was very heavy. does anyone know why this is???