"i have been using this since nov. 2013 i have a love hate relationship with it. 1st let me say it does prevent pregnancy well. but... like i said i have had it for 2 years... the 1st year was crazy bleeding and very very painful back pains (i still have back pains to this day). sometimes 2 weeks every month. i never skipped/ missed a period. it took maybe 8 months to regulate. after six months of being a regular cycle (lasting 4-6 days a month), the crazy bleeding came back. april 2015 my cycle lasted 16 days. i the spoke to my ob and gave me bc pills for a month to help reset my system and help with the back pains. didn&#039;t really help much. now oct 2015 i have had 2 cycles this month, throwing up, headaches, bad acne, sore breast!"