@naturegirl5 my functional doctor identified candida fungus as an issue and I went through a candida treatment protocol. That included a medication to kill the yeast yeast infection. He did supply me with a probiotic. My Gastroenterologist recommended a probiotic for a month if I where prescribed an antibiotic. If you use a probiotic make sure it's really one. Probiotics are supplements and not regulated. Align probiotic was recommended by the GI. The functional doctor provided a product that needed refrigeration and I don't know the name.
I didn't take a probiotic during chemotherapy. I did take many other supplements that were recommended just for me by my functional doctor. I would encourage anyone with a major health issue to also see a functional doctor. The treatment protocol will be specific to you. Your issues are unique and what worked for me probably won't resolve anyone else's issues