Please help! What is this??

These sores showed up 3 days ago and have gotten worse. When I first noticed them, I was itching and thought I had a yeast infection from an antibiotic I was on. I used some monistat cream I had and only later realized it had expired nearly 5 years ago (I've only ever had one yeast infection). I bought new monistat and used that, tried to use neosporin (thinking it would heal the sores), and eventually started using vagisil. I went to an urgent care clinic and the dr said it didn't look like herpes to her, but didn't test for that for some reason. Test for yeast and bv came back negative. Sores have gotten larger and I can't see my dr until Mon. Please help if you can. Will post pics after this, not sure how to add them to this.

Can anyone tell me how to upload pictures?

Log in on a pc, then you will see the add pic icon