I would like to reply to this post to be able to put some of your minds at ease. I noticed a lump on the left side of my neck approximately 2 inches from collar bone almost 7 months ago ( this was how long waiting period was for ultrasound) during that time I was driving myself crazy researching on the internet mainly finding cancer forums! I also have high anxiety and thought for sure I was dying. I had my ultrasound yesterday and wow I am so relieved to find out that these lumps which are not lymph nodes are suppose to be there we have them on both sides, some people feel them more than others. The doctor told me that once you find them you pretty much can't stop touching them I now if searching can find the other one on right side which is a lot smaller, the one on left is 5 mm which is tiny! But it's scary when you feel a lump. I suggest that see a doctor, put your mind at ease.. but stop searching the internet it will bring you down and make you go crazy! I no longer pry around my body searching for things I am living life to its fullest good luck!