For about 7 months my right arm gets numb and tingles at night with hand cramps to the point of me being in tears. Now since February 15th, I have been experiencing a radiant pain in my right lower neck and shoulder. If I lift my left arm my neck really hurts. For the last two days when I turn my head to the left it's crackling with severe pain. This is stopping me from sleeping at night. What could this be?
Also, for about 8 months my right knee is very weak and has pain in it. It sometimes gives out on me.