best vitamins to help irregular period?

Destynee • PCOS • 2 natural born • pregnant with our letrozole baby🤍
I'm just trying to get my period under control so I can better track my ovulation and I'm not sure what vitamins to use. Any suggestions? I don't like medications I tried provera and it worked but not too well, plus I'm not covered for insurance at the moment so any over the counter is great! Thanks ladies!