My stepson is 35 and in reasonable good health. For the past two weeks he has had terrible headaches, nausea, unable to keep much food down and serious night sweats some night requiring him to change the sheets up to three times. He went to an Urgent Care the first week and was told he probably had a virus. Now two weeks later not much change. He doesn t want to go back to the clinic because he s the stubborn type and feels the dr doesn t know much. I realize that these symptoms could be indicative of something serious. What are your thoughts?