My doctor said that generally they test your insulin levels when they test for PCOS because they have found the most women with the condition have an insulin resistance which explains sudden weight gain and that tired and sick feeling. I was on metformin for 3 months and i have finished my box and im waiting to see the doctor again and ive been off them for about 2 weeks now and i have noticed i am beginning to feel really odd and just feel really tired. But i do notice that now before i get AF i am very cranky and just "know" that i am getting it. I also feel very bloated a week leading up.

The pill will also help regulate your cycle, i was on yasmin which is supposed to regulate your cycle but the does of estrogen was too much for me and i was getting rotten migraines and feeling nauses all the time so i was told to stop.

Have to say that PCOS is very frustrating. But if you experience bad cramping and pains leading up to AF try Naprogesic which you can get from most chemists it is a true god send