Are there any quick home remedy for slowing down severe diarrhea episodes and soothe sharp abdominal pain that comes with the diarrhea? what do you do when diarrhea is so bad that you can't leave the bathroom for hours?

First you have to determine the cause of severe diarrhea. Infection? Food intolerance? Irritable bowel syndrome? Side effect if medication? For benign occasional bouts like yours,I'd recommend drinking lots of room temperature liquids &eating only a very soft, bland diet and have a prescription on hand for antispasmodic medication like dicyclomine as well as the taking of Imodium properly