I was diagnosed with PCOS whilst TTCing DS because my cycle completely stopped. I had always had irregular periods, not terribly irregular, but enough to be a pain. I did have an ultrasound many years ago which showed some cysts on the ovaries.

Anyway, the Gyno said that my weightgain during my late 20's could have triggered the 'syndrome' side of it. Which resulted in me having no cycle at all for nearly a year until I went onto Metformin to combat the insulin resistance. Mind you, my weight gain wasn't much at all, and I certainly wasn't overweight! But apparently body fat etc contribute to the whole hormone balance thing. So I guess my only piece of advice would be to keep within the healthy weight range, or healthy body fat range - while you can.. apparently one thing with the weight issues of PCOS is that it's really hard to lose weight.

Perhaps my uber-regular periods during breastfeeding were because I dropped down below my pre-baby weight! Hadn't thought about it before actually. I kinda thought perhaps the pg and feeding had balanced out my hormones.. but perhaps the b/fing dropping my weight back down below pre-baby weight did the trick! I'll probably never know

There are herbal supplements and things to try and regulate your hormones, I remember taking vitex a long time ago to regulate my periods and it did improve things.. but I'm useless at taking tablets LOL so it didn't last long. Perhaps seeing a naturopath or herbalist could be helpful?