Hello, I have been back and forth to the ER due to vomitting, diareah, sharp pains in my lower left back and abdomine. I haven't had anything to eat in a week. I was told that I had colitis and gastro..idis I tried to eat something yesterday and today I woke up with the same horrible pain in my back and running off again. These symptoms are what triggered my illness in the first place. This time when I wiped myself I notice little black streaks in my watery stool. Followed by vomitting. It even hurts on my lower left side when I breath.