I have had what I think is an ulcer in my mouth for roughly 3 - 4 days now. It is located on the upper part of the right side where my gums are. It has now spread to where the entire right side of my upper gum line is swollen And feels as if it has spread throughout the entire gum line. My rigjt side of my face is swollen and my throat feels like it is getting infected as well. What do I do here? I've gotten cold sores before like once or twice a year but have never struggled with this issue. Please help!