"i&#039;ve been on this pill for a year to treat pcos. my periods were very irregular and i experienced spotting and a low sex drive for first three months after starting. then i was having normal 3-4 day periods every other month.  i also had trouble with nausea and an upset stomach but it subsided after a week or so. i continued to workout and eat somewhat healthy and i was still able to lose weight. my only complaint was that after starting the pill, my skin got very sensitive to the chlorine in the pool."