Almost 2 weeks ago, when sitting at my computer at work, I started getting an intense pain in the lower back of my head on the left hand side which seemed to intensify when I stared at the computer. I also noticed what appeared to be tightness and soreness in a muscle about 6 inches below my neck on my back left of my spinal cord. I assumed I just tweaked a muscle, but it's been 2 weeks and the muscle pain and intense headaches continue and neither has subsided in the least. Any idea what this could be? I'm 44 and in relatively good health but defintely had a very stressful time the last 2 weeks with quarter end at work.