Out of no where earlier, my stomach started cramping up extremely bad! Like really, really bad. I started shaking, sweating, and felt like I was going to pass out. So I got in the shower and that help a little. Then I started getting extremely nauseous. I threw up 3 times within 1 hour. The nausea stopped. And the cramping isn't so bad now, it comes and goes. What in the world could this be? My period began on the 2nd and ended the 4th. Witch is really strange, it's never that short.