I'm 19 and began using this method at the end of october 2012, as of the 1st of november my periods came. This was the normal time for me anyway so I didn't think anything of it. Then from that date they haven't stopped or got lighter.I know they can last 2 months using this but it's now been almost 4 and I'm a bit worried as it's still very painful and I'm using 2 boxes of tampax heavy each week. I did not go back in January for another one because of this so therefore it's not even effective anymore. I'm also worrie it could be affecting me in other ways such as iron levels, as im constantly tired even when I've had a lot of sleep, any ideas would be appreciatd.