yes your mirena is giving this yeast infection, my wife had it the mirena for 2 years and suffer with yeast infection from about a week after putting it in, which she never got a yeast infection before. She had it remove because of weight gain and the yeast infection went away with it. She ask her doctor on numerous occasions and she said no it had nothing to do with it, but we are convince it did because of the result 2 months after removing it.