Erin, yes thrush comes from overgrowth of yeast. It is encouraged further by being immunosuppressed. Talk with your doc about it. I use diflucan "daily" (aka skip bout half the week usually) But you can get it in your bloodstream and be in trouble with it in no time. I think it was missy that says probiotics and they have worked for me as well. I just forget to keep them on hand all the time. HOpe that helps!