Swollen lymph node on one side!? Help please!?

I have a swollen lymph node on the left side of my neck, it's under the law and it's movable. It isn't very large, seems..smallish but I can't really tell that well. It doesn't hurt at all, and it's been there for 2-3 weeks and it's starting to worry me. I have no night sweats, no fever, no weight loss, no fatigue. I feel perfectly fine so that also rules out infection as well, the only thing I was speculating was that it was caused by my wisdom teeth. I have a wisdom tooth that is growing in on the top row on the same side as the node. It grew a bit and now it stopped, the tooth has stayed the same size which isn't that large so I'm thinking that it is impacted. This is my only reasonable explanation for why the node is the way it is. I'm only 16 and the fear of having something like lymphoma is nightmarish. Please help me.