Please.... I am really worried, why is no one replying to me?
Sorry you are distressed about this. Try not to go straight to the catastrophic thinking of something very serious. Likely it is not. Cold sores are probably an old or newly acquired herpes simplex 1 (oral) and it's so common. Kids have this! About 80 percent of the population has been exposed to herpes simplex 1. So, not to worry about that. A swollen lymph node while sometimes happens as a sign of cancer, that is unlikely in your case. Lymph nodes swell when the immune system is doing their job. If you have any type of infection, you may get a reactive lymph node as white blood cells accumulate there. Then it takes a bit of time to go away. They are a natural response most of the time to your body fighting off an infection. As to the lumps you describe, could they be nothing. Do they hurt? What happens if you press on them? But since you have them and concerns, your best course of action is to see a doctor for them to take a look. But I would not suspect anything serious at all from what you describe. Let us know the outcome!