Hi, last night when I went to lay in bed, I noticed a sore feeling on the back of my head towards the right side. I felt the area and noticed a fairly large lump. The next morning, I noticed another fairly large lump, this time on the left side. As the day progressed. I began to develop smaller lumps in the back of my ears, 3 behind my left ear and one behind my right ear. The lumps are very tender and even hurt when I look up or turn my head in different directions. I've also been getting prety bad headaches the last couple of weeks. Is thias something that I should be worried about?