I have a very painful, swollen bump on the right back side of my head, right in the area of where I remember learning there are lymph nodes. It's only on the right side, and started up about an hour ago. The pain continues to get more and more intense, and when I turn my head to the left, it hurts that area very badly. It's also extremely painful to the touch. The bump isn't really visible, and it's not red as far as I can tell, but it is very easily felt by feeling the area. It seems to be slowly getting bigger in size also. All of this occuring within the last hour. I don't have a cold, as far as I know, or an ear infection. No sore throat. And my headache only barely started a few minutes ago. Is this something to be worried about?