Ok, so I was in school today and it was that time of the month, and all of a sudden I started to get cramps. Normally, I get them at the start of my period, but they're nothing I can't handle. This time, however, the pain was so bad that I spent my of lunch lying down in pain. I felt really sick. Then in my class, I had to leave the classroom because I was about to throw up. This never normally happens and I'm just wondering why?