I have had a low grade fever everyday,most of the day, for three months. I've added symptoms, elevated CRP (13) area on chest CT shows pocket of congestion (no tumor) in left lower lung, night sweats, sweats w fever w any exertion, more recently chest and upper back pain, across and under shoulder blades, at sternum , overall uncomfortable and fatigued, can sleep for long hours, no motivation... Today had CT scan of abomen and pelvic areas, no results yet. What could this be?