My girlfriend in her fifth month of being on the pill had her period at the begining of the month and then had another just as she began her light blue pills that was heavy bleeding for two days and then light spotting for the next 5 days. I was wondering what this means. She did drop a light blue pill down the sink and took the next days light blue pill instead a half-a-day late. Then took the next days light blue pill out of another pack and took that instead just before the second period started. So im not sure what effect that would have cause im doubting that would be the sole cause of this second period. I was just wondering if anyone had any previous experience with this and could make any comments on what the cause of this could be.