I am a 47 year old woman suffering with thrush in mouth what could I do to keep from going to see a doctor?

Baking soda rinses. Oral yeast infections are related to aging, associated hormonal changes, diet issues and medications (especially steroids), dentures. A teaspoon of baking soda in a 15 oz glass of water- swish for 60 seconds and spit out - 4 times a day may help. Avoid simple sugars, and seek professional care if this doesn't help. Prescription medications may be required to treat.