Oral thrush issue. I was put on antibiotics for Bronchitis and ever since have had oral thrush that will not go away. I have been on Nystatin for 2 weeks then Diflucan for 1 week and if anything its only gotten worse. I am not experiencing symptoms on vaginal yeast infection as well as the oral thrush. My throat and tongue burn and there is a thick white coating on my tongue and going down my throat.