"i started with sprintec and it seemed fine...then they switched to previfem. i have horrible vaginal discharge almost everyday, i have cramps sometimes almost as bad as before i went on the pill. my period lasts just as long as before 5 days and is still super heavy. i do have unprotected sex with my boyfriend and haven&#039;t gotten pregnant yet so that&#039;s a plus. more cons, more emotional, sometimes chest pain, nausea, i&#039;m ready to quit. only pro can predict when period is coming and not being pregnant"