I became ill over two weeks ago with symptoms of nausea and diarrhea. No energy and no appetite. After a few days of this, the nausea eventually went away, but since then I still have symptoms of weakness, frequent headaches, usually on the back of my neck, still a low appetite and low energy. Today I felt pretty good, but then in the evening, my hands begin to freeze and the rest of my body feels very hot. Many times during the night, I wake up soaking wet and very cold. Others have been sick with similar symptoms, but they have recovered a long time ago. Guess I would like to know if I should see a dr. I am thinking it is probably a virus, but what do I know? Thanks very much for reading this.