Period 27 Days Late!

So, full disclosure, I have been diagnosed with PCOS. And it is a bitch! I never know when my period is coming. At one point I didn't have a period for about 6 months. I have been on Metformin and it works for a few months, then back to uncertainty. My gyn gave me Provera to take every six weeks and that is iffy as well. Finding things to wear in the summer (hello white Jean's, shorts, anything) when you don't when it is coming is a gamble. Does anyone know an alternative, preferably a natural one, that will help regulate this thing that has taken over?

Signed,

A Woman Fed Up and In Distress