I feel like I have a swollen lymph node on the left side of my neck?

I had a big toothache 2 days ago, and I have to get a root canal done, but I put it off. I have been getting pain in my ear (left) and then I started to get a sore jaw, which turned out to be a lymph node the nurse practitioner said.

I also developed over night.. a small tear inside my mouth, on the left side, near where the tooth that needs to be root canaled is. I asked for amoxicillan, even tho she didnt think I should be alarmed. Also I had told her about ear pain before, a week ago and she checked but said that my ears looked "normal".

This morning I couldnt lie on my left side of face.. I had to lie on my back or right side. I am starting to take the amoxicillan.

What do you think? Any answers will be appreciated. its still sore when I swallow as the lymph node feels swollen on the inside, not enough to show, and i have the tear in my mouth.

someone else said mono, but I havent kissed anyone and I do not drink out of peoples glasses or cups. Im a little germ phobic that way to begin with. I don't have any bleeding.

I think you have mono, but I'm not sure about the tear. Could you add information about it? Is it bleeding? Bacterial infection is not very likely.

Edit: There are other ways to get mono; I've gotten it for no reason. If the tear in your mouth isn't producing blood, I wouldn't worry about it. Get a mono test, please.