I have what I believe to be a swollen lymph node toward the back side of my neck rather than the front side where I notice them when I'm sick. I'm not?

Lymph node ? If the lump is on the side of your neck, this is a common "left over" from fetal development called a branchial cleft cyst. They are present from birth, and sometimes you can go back over photos and find that they have been with you since you were young. They are not problematic, do not change, and can be small or large. A fairy large, one is pictured here.