When I have to use the bathroom to poop, it come on very suddenly and severely. Its have foul smelling, dark, gritty, mucus in stools .It always feels like I have more to come out, but nothing does. I also have abdominal cramping middle left side, right below my ribs.I frequently have dry burping, without drinking or eating anything. I have extreme trouble falling asleep, and never feel rested. During the day, I have fatigue , dizziness , light headednss and a dry mouth accompanied by a bad taste