"it works.. but my period was all over the place for 3 years. i would have 3 day periods, then spotting, then back on heavy for a day then back off for a week then started all over again. some months i&#039;ll have my period for 5 days, others 2 weeks. by the time the bleeding &amp; brown spotting stop it&#039;s time for another cycle. this birth control was pointless for the most part because i couldn&#039;t have sex. my appetite was through the roof. and after my 3 year mark i had my period for a full month, with very few spotting days in between. i&#039;m sure it&#039;s because my body it&#039;s getting back on track. but i&#039;ve had a period more on this bc then i did with out it. i&#039;ve gotten pregnant on the mirena, &amp; i didn&#039;t like this one. i think done with bc for a while"