Runny/diarrhea poo 5 months and 3weeks

Lucky

Baby girl caught something at the CDC. She’s been having runny poo for 2 days. No fever, vomiting or any other symptoms. She’s been pretty normal just her pooing almost after every feeding. Any advice that y’all have on this type of situation? Her pediatrician said to have her ride it out. But every time I change her I feel horrible that I can’t help her or give her anything.