birth control
"I'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."