"this medicine is great. serves very well as a birth control. however, i can go months without my period. havent had one since january and it&#039;s almost july. i know i&#039;m not pregnant. i had 1 day of bad cramps, bled for literally 5 minutes then just cramped all day. it can be worrisome if i&#039;m sexually active because i wonder if i&#039;m pregnant, but it works well as a birth control"