Most likely it is some kind of infection. It may not be yeast, but bacterial. This can be the result of a sexually transmitted infection, or sometimes they just happen and aren't related at all. If you have used a new bubble bath, soap, laundry soap or lotion lately it could be a dermatitis as well.
Click here for a good article by Medline Plus.
You don't have to have all the symptoms listed in this article.
The doctor will get to the cause of it, so I'm glad you are going to be seen.
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