Birth Control Cycle Irregularities

Liz
Ok, so my period has always been irregular! Before i had sex, before i even knew what birth control was; it would either skip a month (maybe two) or would come at different times during the month.
Which is part of the reason why i wanted to be on some sort of contraception! However, since ive been taking it (6 months now) it became even more unpredictable, especially lately!
Before, my cycle would last from 3-5 days. It has now pushed to 7-10. Last month, it came twice in one month.
I've decided to go off of it because its really not helping. My partner & i are still very careful so i wanted to know if this has happened to anyone else & if so, opinions on what i should do or what's to come.