i have been on number of different birth controls pills for over a year now. but my problem is after a months of a taking them they dont work at all at first but i still countinue to take them...then they start to work but after that i have my period like twice a month i dont know what to do about this bc i have been to the doctor and all they did is just start me on something different everytime! i am really sick of this! i take them bc i have really heavy periods and they usually last for 8 days or so! if anybody can help i would grately appreciate it!