What supplements regulates menstrual cycle from irregular periods and PCOS?

I know birth control may do wonders but what kind of supplements or vitamins will help reverse my irregular periods to make them regulate back to normal?

Also does one a day women vitamins help regulate periods? I thought I read on the internet it does,but I may have misread it. I know vitamin d helps but vitamin d is in one a day and multi vitamin I think.

It's easy to put on pounds then it is to lose weight! Lol but I don't dieting will help with my cycles. I have an 36 day cycles according to my period trackers.