One year old with bad diaper rash!

Ladies I need help. The amoxicillin my daughter is taking for her ear infection gave her diarrhea. And the diarrhea gave my daughter a really bad diaper rash. The only cream that always helps her rashes are not helping it at all!! It’s hurting her to the point where it’s not letting her sleep at night. Any remedies I can try? Thank you in advance!!