"i  have pcos and worked for years on diet and exercise to regulate my period. but never was able to get to regular to where i could predict it. for about nine months prior i was taking metformin to help and i lost about 16 pounds with it. so my gyn recommended taking birth control to help regulate my cycle.  my period became regular to between 22-24 day cycle.  however i had intense bloating and crazy food cravings, that i have never had before.  my mood swings changed to the point where some months i would be really depressed and down.  around the 3 or 4 month of being on the pill i started having severe break through bleeding that lasted between cycles and eventually did go away. once that stopped i was experiencing severe indigestion."