Hello, im not clear on whether I have a cyst or a swollen lymph gland. It is under my jaw next to my artery. It Hurts when I move or touch it.

Do see a doc... A new growth like you described, needs to be examined by a doctor. It may be either of the things you described or something else but only by seeing the location and getting a feel of it would a doc know what to do next. Best to you.