The eczema affects the growth/production of my fingernails and takes several months to begin to clear up. I’m in a wedding in October and am worried that it won’t be cleared up by then. I am currently using Elecon cream to treat my eczema on other areas and it works really well, but doesn’t seem to work on my fingernails at all. Any suggestions?

That could be a fungal infection. Nail bed is a very common site for that. It won’t heal with any cream but with proper antifungal treatment that too for 4-6 weeks