@jespah,
Me too, but I have memories of specific places I vomited while having awful cramps... a telephone booth at Student Health (ugh!), the lawn between the chemistry building and the math/engineering building (ugh), the Women's bathroom (I still remember someone saying, "Oh, please!". My cramps went away when I started on birth control pills and also increased exercise.
In the years since, I've read prostaglandins have something to do with menstual cramps - but even that was pretty long ago, and gynecologists may know more by now. Good idea, OP demilovato, to go see a gynecologist, given your history.