Has your doctor ordered a PET scan? If not, insist on it. My doctor ordered one before I had surgery and it was clear, so I had some piece of mind. Radiation is scary but you will make it. If you haven't started yet and if your mouth is feeling better, start loading up on calories. I am two weeks post radiation and am still losing weight. My mouth and throat are feeling somewhat better but nothing tastes good and I have little desire to eat or drink anything. I know I need to do better but it is hard. I hope you have help. As treatment progresses you may be on more pain meds and will need help getting to your treatments every day. Hang tough, you will make it through this.