Rash?

Callie
What can I use for myself for a really bad rash that's safe for breastfeeding? I've apparently developed eczema which I've been using lotion for but now I'm also having some sort of allergic reaction for two days now. My eczema lotion hardly touched it and same with aloe. I have low supply so I need something that won't effect my supply and is safe for baby. Help??