I have not been well for two years with gastro issues, sweating, weight loss, thick phlegm. In fact a lot of the symptoms point to some form of autonomic neuropathy. I also have thick phlegm and a strange tickling sensation in my chest. A low dose ct was clear in Feb 2016, but I am worried about sclc causing paraneoplastic autonomic neuropathy with the tumor being too small to appear on CT. Am I being silly? I am male 49.