Itching rash

Steph

My 8 month old daughter has a rash on her stomach and legs and it’s itching her. I’ve tried lavender oil, alveeno oatmeal baby wash, hydrocortisone cream. What else can I try??? She doesn’t sleep unless I’m holding her and I’m going crazy. I think I’m finally breaking down and taking her to doctor tomorrow. I’ve been holding off because they always say. “It’s probably because she’s teething “