Diarrhea issues

Kimberly • Mommy to a little princess ❤️

My 4m old has diarrhea its been 2 going on 3 days today. I called her pediatricians office and they said they would call me back of course they didn’t I tried calling back and it’s 4pm so they’re closed. Anything i can do? She’s getting a diaper rash I’ve been putting Desitin. Or should I make a trip to the urgent care?