Arimidex and smelly urine

I'm new here so please forgive me if this has been asked before. I had a mastectomy last fall. No chemo or radiation. Have been on Arimidex about six months. My urine is becoming increasingly smelly. Embarrassingly bad. Sometimes it smells like hot dogs. Sometimes like bacon. Sometimes a sharp green grassy smell. Sometimes the smell is so strong it fills the bathroom and goes out into the hall. I went to the doctor. She did a lot of tests(UTI, vaginal infections), including cultures, and said everything was OK. I've kept a food/drink diary and can find no connection to anything I've consumed. Could it be the Arimidex?