Effects of veganism on period

So I was wondering what changes you saw if any on your period switching to veganism or vegetarian? Also did this help with fertility or make it more difficult? I’m currently vegetarian mostly vegan because of my beliefs as well as health. I noticed my last period was not intense or anything but it lasted 8 days which it never does. Also I usually pms a week ahead of time now which I use to not. I should mention I’m breastfeeding an almost 3 yr old so I don’t know if that still has any effect