Funny how a diagnosis doesn't mean much till you have it. What is candida albicans?

Yeast. This is a yeast-like fungus which causes "thrush", vaginitis, and in immunocompromised persons can potentially produce serious infections. Otherwise this is very common and easily managed.
Yeast infection. Candida albicans is a particular strain of yeast that causes the majority of vaginal yeast infections.