our dd (2) has been pooping and pooping and pooping the past 7 days. She seems to have very acidic stool that has caused a terrible rash and we change it right away. She comes to me and is saying me poopy mommy change me. And she is going 2-3x her normal routine, I have done the treatment for the rash (air it out, weleda cream) but it's just not getting better and I realize that I need to try to change her gut. I have tried to give her the BRATY diet (bananas, rice, applesauce, toast and yogurt) someone told me works for loose stools, but nothing so far. What would you suggest? Her poor bottom has welted up spots and even little areas that are open and weeping. HELP?!