I Am Kind Of Worried About The Worst Possible Prognosis

Question: I am 51 years old male, nonsmoker. I work on computer 10 hours a day for many years. I have some history of left and right shoulder pain and neck pain that comes and goes. This time I got worse neck pain about 5 weeks ago. My neck hurst and radiates to the shoulder, the most painfull point is somewhere near neck to the left kind of top. I get it every time I look down and right, this hurts the most. Pain varies with days, some days the pain is so severe I have back head headacke, I think it is radiating from the neck. My neck just feels stiff and hard to look left or right or up or down. I also have right shoulder pain when I put hand above the shoulder line, this pain is 6 months but seems it is not connected to my recent neck pain. The worst is at night because it hurst to sleep on either side and when I turn around it hurts. Worse is if I lie on the bed and try to lift the head. It is not sharp pain mostly but kind of it gets worse the more I move my head. At morning it gets a little better after stretching the neck, when I wake up I am all like tied up up there and shoulders hurt also. It doesn't go away and now I am kind of worried about the worst possible prognosis (like cancer). I do not have any neurological symptoms in my hands.