First, besides the IR test, I would also suggest a cholesterol test be done. PCOSers often have higher cholesterol levels than non PCOSers.
So many people just think of PCOS as a fertility issue, when in fact it impacts so many parts of our bodies and our lives! Tell tale signs besides fertility, obesity, IR, diabetes, cholesterol, high blood pressure, acne, hair loss on the scalp, hair growth in areas you don't want it, oily skin, dandruff, patches of dark skin, skin tags and sleep apnea - crazy how much it effects! It can also put woman at risk of edomitrial cancer if they are not cycling.
Treatment for women varies. Many Dr's suggest going on the pill if not ttc. I for one, gained 40 pounds on the pill and my PCOS symptoms worsened (and I hate to take anything daily!).
You can take Metformin or Glucaphage. Often that will get the blood sugars in control which will help get all the hormones in order.
If you're ttc, there are meds that will help you ovulate - clomid is usually the first one prescribed as it's an oral dose.
Weight loss is said to also help with the symptoms.
There are some drugs that can help with the excess hair growth and the male pattern baldness as well - though, I don't know much about them.
I'd also say that breastfeeding helps to keep the hormone issues at bay, though I don't think that's been scientifically proven, this is just my observation.

I joke that I'm never going to stop.