Can you get a yeast infection in your anus? What would the symptoms be?
I know it has been a while since you posted, but I was wondering how you are doing. Did you ever get the opportunity to see a doctor? I am not a doctor and can't diagnose you, but the symptoms of a yeast infection can indeed spread to the anus. They may not even be noticeable until that point, so it would appear as if it originated there. I'm going to add some links that might you understand how to treat it:
Vaginal Yeast Infection Prevention
How to Treat Recurrent Vaginal Yeast Infection
Please consider returning to the community to let us know how things are going. I'm sure your experience could be a great help to others!
Best of luck,