Hi, just yesterday I woke up and thought that I had bit my check while sleeping, as the day went by it only got wrose by the nightfall I could not take the pain and felt like a small ball had devoped in my thort. I have a ball inside my mouth where I thought I bit myself. It looks like a sore with pus. Could this just be a bad mouth sore? Strep? Maybe a cyst? I have no idea how to cure such a thing. It hurt to sollow, eat, even eat.