I had PCOS for years and after I had lost some weight last year, I started getting my periods regularly. I stopped all Metformin a few months back and I was still regular. I was supposed to get my period the day of surgery 6/15/16, but thank fully I got it two days later while at home. I don't know if they will come back "on schedule" or due to the surgery trauma and such light eating, it will be delayed.
Hoping to have a red-less vaca in Sept!!