Hello, I m a 17 year-old male and have stiffness/pain on the left side of my neck, as well as swelling/lumps below my jawline and above my collarbone. These lumps aren t hard, they move, and they hurt when I touch them. They also feel like they shrink, but I m nauseous and when I gag or throw up, they feel as if they get bigger or agitated. I also have some diarrhea and have been losing weight rather quickly. I went to my pediatrician and she told me that it was probably a virus, but she wanted to run some tests because of the weight loss. I haven t coughed up any blood or anything, so I take that as a good sign. I just want to be able to narrow it down so I can stop worrying myself, because that just seems to increase the pain/nausea. Any help would really be appreciated, thanks!