Tiny cut on the outside of my vagina?

Well for a little over 3 weeks I was having yeast infection symptoms. I used Vagisil whenever I needed to but then I finally went to the doctor. My doctor did a test to see if anything else was there and it came back fine so she gave me a one time pill and a medicated cream to put on. At first it was okay but then it didn't go away. I switched back to Vagisil two nights ago and it started to burn like crazy so I did it twice and when that didn't help I stopped. I haven't put anything on since yesterday. It wasn't so bad today but when I looked it was very red and there was something that looked like a tiny cut almost. It wasn't from shaving because I don't shave that far back, it was all the way in the back. I'm not really sexually active, just oral or fingering from the same guy for over a year, but we stopped for a while and recently started again. In that break I got oral once from a guy I was dating for about a month. Other then that there's not much more action going on. I have to wait a week to see my GYN so I'm a little worried. What could this be?