Stiff neck that clicks when I move it, pins and needles from neck down right arm. R shoulder pain. What should I do? Numbness in arm- dead arm?

"pinched nerve" Sounds like you have a "pinched nerve" in your cervical vertebrae. See your family physician who may see fit to send you to an osteopathiic physician or a physiotherapist and maybe order an x-ray of your cervical spine.
Cervical spine. It suggests something wrong either in the cervical spine or the brachial plexus (the complex of nerves leading into your arm). You will need examination by a neurologist or hand surgeon and probably require imaging studies after a full exam. Go soon. The earlier neuropathy is corrected, the better the outcome. Good luck.