What could this lump on my neck be?

I have a small lump on my neck just below my right ear, and right behind my jawline. It's firm but not rock hard, and it doesn't move around, it feels like it's under the skin on the muscle or some other tissue. It's slightly sore, especially when I put pressure on it. I am currently being treated for a bad urinary tract infection which involved blood in my urine. I read that these lumps can happen because of an infection, but would the lump be sore?