Small lump below ear

I recently posted a question concerning a small lump I found right below my left ear. It's lined up with my ear lobe. I am 16 years old and very worried and concerned on what this might be. It is small and not hard. It's about the size of a bean. There are no symptoms of anything....just a lump and it's painless. One of the big questions I have is.... Can this be some kind of tumor?? I'm very worried over this. I am very healthy  and there are no symptoms of anything as I said before. Most of the answers I got were that's it's a swollen lymph node from an infection but I feel fine. Should I visit a doctor?several Years ago I had a problem with my left jaw and ear. There was a pain that lasted weeks. Can this be related??