Ovulation time according to glow. Please help!

Hi guys, I'd like to know if anyone else has such a huge gap between their Af. Mine is 20 weeks apart. I have no idea how to tell when I'm ovulating (never get the white / clear fluid) although my doctor told me that I don't due to my pcos. He told me I might (I get a might after all those tests)have metabolic syndrome too. So I'm quite confused. I saw a dietician and she said I'm insulin resistant and not diabetic as my obgyae interpretation was different. How common is depression amongst pcos symptoms and how do I go about it. I'm demotivated and although I really want a baby I just don't have the strength to try anymore. Struggling for 3.5 years.