I have had a stomach pain that feels like a knot in my side. It started right before I got sick. I went out drinking the night before and next day I was sick. I thought I was hangover but it turned into a stomach flu. I was going from both ends. The vomiting quit. I took pepto for the diarea. I know that makes your stool black. It's been close to 24 hours since my last dose. I haven't had diarrhea again until a while ago. It's grey though and the knot in my stomach is still there just not as unbearable. What should I do? I mean I'm not in pain and haven't had any alsers before. Just uncomfortable and tired of pooping.