Hi Everyone! Long time lurker, first time poster

My 6 month old daughter has had a rash for going on 3 weeks. She has had a yeast rash around her neck and chest from drool in the past and Nystatin was able to very slowly clear that up. This time, the rash is all over her body--neck, chest, arms, legs, back, and now her face. The only area it doesn't seem to be reaching is her diaper area. Our pediatrician believes it looks like yeast to her, albeit a pretty bad case, and has prescribed Nystatin--the ointment and powder--and an oral Diflucan. So far, nothing has worked and it's only gotten worse. It doesn't seem to bother her too much though and no fever or any other symptoms.

We have an appointment with a pediatric dermatologist next week but I'm wondering if any of you have experienced a rash like this, what was causing it (ie. could it be a milk/food/detergent allergy thing?), and what you used to get rid of it. Any suggestions would be helpful!