Cathy
First of all I'm not a doctor. However, I would like to offer my opinion. Are you absolutely sure that this is a yeast infection? Being it has spread to the rectal area I'm wondering if it can possibley be genital herpes. I say this because I was diagnosed with herpes 4 years ago and I had thought it was just another yeast infection. It usually always spreads to the rectal area. If you have any questions please feel free to e-mail me. Cathy