Cramping and fertility

So I was told a couple days ago by a coworker that her doctor said its good to have really bad cramps because that means she is very fertile. I was told that I might not be able to have children because my cervix was to high so I may be at risk of infertility. But I have really bad cramps and I throw up my first days and have a whole body ache type of pain so can anyone explain to me if her doctor is right on his theory please.