My 3 yr old daughter woke up this morning at 5am crying and she was complaining of stomach ache. We have a home remedy where we take a few mustard seeds and boil it in water and we gave her 1 ounce of that water and about 20 mins later she went back to sleep. She went to bed around 9:30pm, about an hour before she went she had a bowel movement which was runny and there was white foam in it as well and a really foul smell. This afternoon she again complained of stomach ache. Should we take her to a doctor. She only has bowel movements once in 3 or 4 days.