any medical professionals who may be able to help ?!

I didn't know which group to post this in, so I went with the most popular one! Sorry. Anyway I just noticed that I have this weird bump on the side of my neck. It's near the start of my collar bone. I can move it around under my skin, in this picture I was moving it up so you guys could see the size of it better. It doesn't hurt at all, but I never noticed it before. Is it a gland maybe?!