Hi there, those Glands are nothing to be worried about. I have two; one at the left side of my neck and one to the right, I noticed them about 5 years ago(when I was 11) and asked my dad, he says there nothing to worry about and most people have them. There there for no reason basically.
About the night sweats, I don't think myself that they have anything to do with your Glands.
Is the area near your Glands swollen? Red rash? etc...?