I have an abscess in a broken tooth on the upper right side, 2nd tooth from the back. I feel a lump on the upper portion of the gum line, near where the jaw connects. My cheek is swollen and I have a bitter taste in my mouth. I am afraid that it has spread into my cheek cavity. How serious is this? What is the worst thing that can happen if I am unable to go to a dentist? I don't have any insurance. Should I go to the emergency room?