I have had PCOS since I was 12. I lost around 140 lbs in 3 years using my fitness pal to count calories. Some of the time I did WW with my fitness pal. Try to eliminate flour, pasta, breads, sugar, and carbs. I never completely gave up carbs, but I limited them as much as possible. Meals consisted of veggies, fruit, and proteins. I still ate the occasional potato, bread, or sweet. Exercise made a huge difference. My PCOS disappeared, ovulation started for the first time naturally, and I got pregnant for the first time. I lost the baby, but it was a miracle to get pregnant. I gained 20 lbs back and PCOS has returned with some symptoms, but I am also 40.