I m 22 years old, female. No major health issues other than a cold or something every so often. I have been sick with a cold or a sinus infection or both for about a week and I am just now getting over it, and today all of the sudden a small lump has appeared in my neck on the right side, 2 inches below the bottom of my ear and one inch back toward the back of my neck, under the skin. it isn t visible. it feels like it s on a blood vessel or something, kindof rolls when i poke at it and feels like a bruise would when i touch it. I ve had this happen a few times before and it always disappears in a day or two but it always just really freaks me out. do you think it could be a lymph-node ?