I've always been irregular. Another PCOS girl here! We've been TTC for a year now and have to go through the progesterone withdrawal period induction thing every month. Then try meds, etc. We're moving on to IVF if this Femara cycle does not work. It may be worth having a hysteroscopy to check out your lining. That might be the reason for your irregular periods - if your lining does not up enough. My dr is going to do one on me before IVF to check for adhesions, etc. She noticed what may be a polyp on the ultrasound. That may cause lining not to build and prevent you from getting pregnant. This is such a complicated science and it's different for everyone! Good luck!