I have had a dull migraine for about a week. A few days ago, I began to become nauseous. I have not thrown up, but the nausea has stayed with me for the past couple days. I am experiencing upper back, neck, and shoulder pain. I went to a chiropractor and got adjusted. That seemed to help a little bit, but, I am still experiencing weakness in my neck, back and shoulders. My upper body sort of feels the way it does when I have a fever that s braking, or at the beginning of a sickness. No fever. Should I be concerned?