Suggest Remedy For Vomiting, Diarrhea And Body Rashes In A Toddler

My daughter will be 15 months on march 3rd. Early this morning at around 5 am she threw up what looked like curdled milk. After that she started getting diarrhea that looked like yellow cottage cheese. Since then the color of it has changed to all clear and very runny almost as if she is pooping water. Im calling the doc tomorrow but im starting to worry since the diarrhea has given her a painful rash.