Metformin .. Pcos

Ivonne
So all my test of hormones are normal but I got a 43 on insulin resistance. But I had not fast. I ate like 1 hour before. Can it be high because I ate ? Anyways doc put me on metformin. But I've never been irregular just these 2 months I've had long cycles. I don't know if I have pcos. I am nervous . any experiences?