Pain in the Neck!

I have been having trouble sleeping these past two weeks. I have this neck and shoulder pain and I totally making me uncomfortable. I bought a new mattress A FEW days ago thinking the old saggy mattress is the cause of my muscle pain. Nope! My new mattress is fine but I still have neck pain. I asked my daughter about it and she asked me a series of questions to rule out fibromyalgia. The disorder is classified by the presence of chronic widespread pain and a heightened and painful response to gentle touch. Well, my pain is not like that. I guess the pain is caused by my poor sleeping posture. I use two to three pillows because I watch TV while in bed. Maybe that is the culprit.