Hi, I'm 21... In the first and second day of my menstruation I'm constantly having these splitting pains in my colon and I have this urge to pass gas and go Nr. 2 even though there's nothing that has to come out... Sometimes, the pain is so acute that I plain and simply can't sit down (if I do, it feels like someone is ripping me apart from the inside!). This pain, combined with my cramps, is making my life a living hell for at least two days a month.

Help?