how is it possible that after one bite of food (and it doesn't matter what it is) or one sip of something, my colon already starts gurgling, the cramps come, and i have to run to the bathroom? whatever i'm eating/drinking can't possible have gotten any further than my stomach, and already i have to go? is it just that the whole digestive system is incredibly overactive? is it all mental? any insight/understanding would be greatly appreciated