I had unprotected sex a week ago with a new partner. Two days ago I started feeling sore in my vaginal area. Yesterday I was still sore but now itchy as well. I thought possibly I could have a yeast infection so I took a diflucan last night. This morning when I woke up I had brown discharge. When I pee it burns and I have brown discharge when I wipe. My period ended Dec. 30th. Could this be just a yeast infection or something worse?!