Hi, My Niece is 3yrs old has had diarrhea for about two months, doctor said nothing is wrong with her, but she gets really bad pains about every five minuets, she cry's and crosses her legs every time she gets the sharp pains, stopped giving her dairy products thinking she might be lactose, but the diarrhea has not stopped, gave her children's Imodium but doesn't seem to be working.