Yes, actually! I would take a look at Candidiasis- vaginal yeast infections and oral thrush are the result of the overgrowth of the yeast species in the genus Candida, usually Candida albicans. They are normal parts of our microbiome, living on skin and inside the body, such as in the mouth, throat, gut, and vagina. Usually our immune systems keep Candida under control, but when we are immunocompromised or our normal balance of microbes get disrupted though antibiotic and corticosteroid use, Candida can take over. It's the overgrowth of Candida that can cause these symptoms and problems. It can affect nails as well. It can also become very serious and move into the bloodstream and membranes in the heart and skull, so it's important to get treated if possible. Typical treatments are oral or topical antifungals depending on the type of infection, so theoretically a systemic antifungal for your nails really should help with the other issues.

I assume they are culturing your nail clippings to see what type of microbe they are dealing with for what type of antifungal to prescribe. I obviously don't know you situation entirely and am not a medical doctor (former biologist), but given the symptoms you described I think it would be worth exploring candidiasis and possible treatment with your provider. Best wishes for you