Why does the right side of my neck been hurting for wks now or a month or two, cant remember exactly, the pain goes to my right arm, i sleep on my back and have a pillow thats raised,i wear a neck brace at night,no other weird symptoms, just sore?

If there is no lump like a lymp node, you probably strained a muscle and maybe when you sleep the neck is not adequately supported. You have not done what need be done to relieve the strain and the neck brace at night may not be what you need but a good pillow that supports you when asleep. I doubt that the brace is meant for you to sleep in. See MD if worse or if there is lump or skin changes.