Hello, I was recently diagnosed with Psoriatic Arthritis that affects my spine (spondylitis) and sternum. I have been on Enbrel injections for about 2 months now, but already had a very low immune system beforehand. I suddenly have become very lethargic and fatigued, have constant headaches ranging from moderate to severe, easy bruising, really bad chills, and have cold and flu like symptoms. What could be wrong with me? -Morgan