question: two weeks ago I had sore throat and a small rash on the hard palate of my mouth that had itched and swollen glands, then it all went away and I was fine, I was tested for strep and mono and both negative now two weeks later I have a worse case of sore throat and rash on top of mouth and it burns and very painful what could it be? could it be mono and it just hadnt showed up the first time ? help!??