I wake up, eat a light breakfast, and take my multivitamin in the morning. Shortly after eating, I take my first trip to the bathroom. Within an hour of the first trip, I'm going every 10-15 minutes, 4-5 times. It feels as though my breakfast isn't digested at all. The color of the stool ranges from light brown to dark copper. Usually it remains solid. Afterwards, I feel weak and tired. I have to force myself to eat light crackers on the way to work just so I have some energy. Any ideas?